Sendo Masato

Summary
The second son of the man who got married with Haruto's and Aki's mother after the divorce, Takahisa's little brother, Haruto's and Aki's little step-brother, due to mentioning Haruto in front of Aki being taboo he was never told that Haruto was his older step brother living away with his own father, the first day of his sixth year at the elementary school he got dragged into Takahisa's and Satsuki's hero summoning.

He suddenly appeared with Miharu and Aki in the middle of grassland near the border between the Galarc kingdom and the Centostella kingdom, the three walked together until they were near a high way where a slave trader spotted them and kidnapped them to be rescued a little later by Rio, his older stepbrother Haruto's reincarnation.

After being rescued by Rio he began to treat him as an older brother, he is invited to the rock house where he explains to Miharu, Aki and him that they are now in another world, since then Rio sheltered the three temporarily.

Personality
An honest, cheerful and easygoing boy that after meeting for the first time with a pretty older girl can't avoid falling in love with her temporarily.

LN Route
After Masato woke up for having breakfast on his first morning on the rock house he met the just awoken Aisia, a little after that he was left alone in the rock house with Aki while Rio, Miharu and Aisia were shopping in Amande daily necessities for him, Miharu and Aki, for the next one month and a half he stayed in the rock house studying Stralh's language under Rio and Aisia, Rio then went to the spirit folk's village letteing Aisia behind as their escort, two weeks later Rio came back and teleported him, Miharu and Aki to the spirit folk's village.

He was introduced to Sara, Ouphia, Alma, Vera, Arlan and the village's elders, who held a party for welcoming them after the party he was already Vera's and Arslan's friend and began to treat Sara, Ouphia and Alma as older sisters, the next morning after seeing Rio having mock battles with Sara, Ouphia and Alma at the same time and another with Uzuma asked Rio to teach him swordcraft, Rio explained him that learning swordcraft isn't the same that having kendo classes and that he would just do it if he passes that the village's children go through for being allowed to become warriors, he must be able of fighting back against Rio while he points his killing intent at him, Masato passed Rio's test and for the next months he learnt swordcraft from Rio and spirit arts from Ouphia, then Rio left the village again for searching for Satsuki and Takahisa and visiting Celia, for the next three weeks until Rio's return his combat training will be left in charge of Sara, Alma and Uzuma.

Three weeks later Rio came back saying that he found Satsuki and that he will attend the evening party that will be her debut in the noble society, after thinking about it for the day Miharu will came up with the plan of attending the evening party with Rio just herself for Rio to just need protect one person in case of emergency, she told her plan to Aki and Masato and both accepted, two days later, in the evening there was a farewell party for Miharu, Aki and Masato, Masato said his farewells to his new close friend Arslan and left the village in the morning.

Two weeks later, everyone arrived to the rock house that was settled near Galarc's capital and was introduced to Celia who was waiting there for Rio's return with Aisia, three weeks later Rio and Miharu went to Amande for going Liselotte to her house during the duration of the evening party, three days later, at night Rio and Miharu brought Satsuki and Miharu with them to the rock house, they talked with each other about what happened to them after the summoning, she will warm them about Takahisa maybe being the hero from the Centostella kingdom, that they need to think seriously about who to stay with and be prepared for even living separated since them.

Three days later, at night, when the evening party ended Rio and Miharu came back to the rock house for asking Aki and Masato if they wanted to go to the castle for meeting with Takahisa in the morning, both said that yes and Rio explained them about his previous life being Haruto and that they may be unable to go back to earth, Aki shut herself in her room, Masato said to Rio that he was happy of being his brother even if they wasn't connected by blood but the girls that began to sooth Rio after seeing him depressed about Aki's reaction didn't the let the moment of brotherly bonding to happen.

The day after the evening party ends, in the morning, Rio picks up Aki and Masato and takes them to the castle, at first Takahisa is very happy for being able of meeting them and a conversation with the three sendos, Miharu and Satsuki begins. Aki tells first thing that she is going with Takahisa to Centostella, but Masato and Miharu tell that they will stay with Rio, Takahisa is angered, he doesn't understand why, Masato tells him that because he doesn't want to live in a castle, that he prefers to keep living with the friends he made in this world, and to keep learning swordcraft under Rio.

Takahisa is even more angered, he asks what is he doing learning something as dangerous as swordcraft, that it's something to kill others, he won't let him learn something dangerous and he will take him to the castle with him, Masato refuses and says he learned swormanship knowing it was something to kill and that he refuses to live just protected by others (you aren't just the only good brother Masato, you're the one with more guts too).

Then they tell to Takahisa that Rio is a reincarnator, his relationship with Amakawa Haruto and the fact that they may not being able of going back to Japan going by Rio's story, he is very surprised and angered because he was the last to know and the only one left alone out of the circle, they call Rio back into the room, Aki and Takahisa begin to try to emotionally blackmail Rio, how can you separate us, we are all brothers, how are you going to separate Miharu from Aki with how important she is for her, Rio tells them that he prefers Miharu and Masato to go with them because he thinks that is better for them to stay at a safe place, that he isn't Amakawa Haruto anymore, and that if they go with him expecting him to be Haruto or the same as when he was Haruto they would live being disappointed, besides there are his feelings of him not deserving happiness because of his revenge.

Satsuki gets angered listening to Rio and makes him have a duel with her, Rio wins and after the duel there is a little of conversation with just the two.

She says that if Rio makes Miharu go with Takahisa and Aki and ignores her feelings she won't find happiness, to not hold back his own feelings and emotions too, that she understands Rio's point, that she thinks that it's the most adult, reasonable and right thing to do going by logic, but that someone that never acts and just thinks is just a loser (hetare), that she wants a happy ending with the six laughing together at the end, that if he yields to Takahisa's and Aki's selfishness that won't be possible and she ask him to properly face those two in order to reach that happy end someday.

Evening of that day, Rio goes to the Sendo siblings' room and tells them that he isn't going to force Miharu or Masato anymore to go to Centostella if they don't want it, Masato is happy, but Takahisa is angered, he calls Rio hypocrite for changing his words, he asks why is he stealing them from him if he doesn't really want them to be by his side.

Aki asks the reason for the change while upset, if he doesn't believe anymore that he and Haruto are different people, he says he still believes it, Aki says then why? Rio says he understood that with his actions he wasn't really respecting their freedom to choose, and that he has done already plenty of things that goes against the Japanese moral and valors, Aki asks what things, Rio says like killing people, Masato is slightly surprised, Aki freezes on the spot, partly for the revelation and partly because she's at least beginning to realize Rio and Haruto are different people, Rio continues and talks about his revenge.

Takahisa is angered, he says Rio deceived Miharu, that is impossible for her to want to go with Rio while knowing that, Rio says that Miharu and Satsuki already know everything, Aki gave up on convincing Miharu while thinking "Are you an idiot Miharu onee-chan?".

Takahisa is surprised of knowing that Miharu and even Satsuki that was always the reliable and wise senpai accepted such a thing and says that he won't allow Miharu and Masato to go with the kind of dangerous person that killed someone and with a criminal saying that is going to kill other people, Rio says very clearly, calmly and directly to his face "I don't need your permission" (this part was really pleasant to read).

Takahisa asks for a duel and if he wins Rio will refuse to have Miharu and Masato with him, Masato joints the bet completely convinced of Rio's victory and says he will have to give up too if he loses, Aki is terribly flustered hearing this because she thinks that like that the brother relationship will break irredeemably.

The evening after losing the duel Takahisa says to everyone that it seems to be better for him to go back already to Centostella to cool his head, he gathers Rio, Miharu, Satsuki, Aki, Masato and Charlotte in one of the castle gardens.

Takahisa gives false apologies to Rio for the things he said about him and lowers his head, Rio accepts the apologies while worried because the place where they were called has almost no guards, then after everyone says farewell Charlotte takes Satsuki and Rio with her saying there is something they need to talk about, Rio leaves Aisia behind because he's worried about the lack of guards around, then Aki takes Masato with her to somewhere else with the excuse of having forgotten something in her room while making it look as Takahisa wanting a little of time to talk just with Miharu, Masato that just thinks that his brother has something to say to Miharu because he likes her agrees to leave the place with Aki, and so Takahisa and Miharu are finally left alone with Aisia watching them in her spiritual form while linking her five senses to Rio to make him hear the conversation of the two.

Some time after that soldiers will come to look for Aki and him, Aki was taken to another room with Takahisa while Masato was taking to a room with just Rio and Miharu on it, Masato is nervous and saying that he doesn't understand anything, that Aki's face became blue when the soldier came looking for them and took her to another room, Rio tells Masato about the kidnapping, Masato's head goes blank for a moment and he begins to apologize while crying to Miharu and with his head almost touching the table " Miharu-nee-chan I'm really sorry for what my stupid brother and sister did to you", Miharu says Masato to rise his head, that it's her fault for not talking to Aki properly while they were in Japan and just running away from her problems with her because she was afraid of damaging their relationship, Rio says to the two that nothing it's their fault, that the ones that have to carry the sin are the ones committing it.

After that Masato asks for Rio's and Miharu's permission for talking to his siblings, he waits until the end of their conversation with Satsuki and Liliana and enters the room where they're, he enters the room and talks to them but Takahisa still doesn't reflect in the slightest and Aki just cries more and more, Masato tells her while consoling her that if she's going to cry then don't do it to begin with.

That night Masato visits Rio to ask him for advice, he says Rio that after seeing his stupid brother that doesn't reflect at all and Aki crying it didn't feel well for him to let the princess Liliana with all the trouble of looking after them alone, that if there isn't at least one person that is family near them that says them harsh words, he can't be sure they will really go to the right path again, so he wants to go with them and be that person, Rio says him that if that is his decision then is fine as long as he is sure he won't regret it, Masato asks Rio to take him to the rock house to tell everyone there what his brother did.

At night they go to the rock house to tell everyone there what happened, they gather everyone in the living room and Masato tells them that Takahisa kidnapped Miharu with Aki's help, they ask Miharu if she is fine, she says that yes, they ask Masato why did his brother do that, Masato says that because he couldn't stand that Miharu loved Rio instead of him, Miharu gets embarrassed hearing Masato and with all the girls suddenly looking at her, Masato asks if it is wrong but Miharu doesn't say anything while Latifa looks with death eyes at Rio while remembering their conversation in volume 4 about her still being the more important for him even if his former family was in this world too now, Satsuki sees the girls' reactions and thinks " you're a sinful man Haruto-kun", Masato realizes he just dropped a bomb and changes the topic to him going to Centostella too and his reasons.

Two days after that Masato goes to Centostella with Takahisa, Aki and Liliana, after saying his farewells to Rio, Miharu and Satsuki, he sees Liliana looking worriedly at Rio and he asks if she fell for him too, because all the older girls he met so far fell for Rio.

Liliana says him that isn't case and that Rio is already surrounded of beautiful women, Masato says her she's beautiful too, Liliana says he doesn't need to flatter her, Masato says her he is serious and he would like to have a girlfriend as beautiful as her, Liliana smiles and says that if he gets too old to marry some noble she may marry with Masato when he grows up, Masato gets embarrassed and says her to not jest, Liliana says that it's Masato's fault for jesting the first, Masato says again he was serious and Liliana smiles again.

They arrive to where Takahisa and Aki are, Takahisa is pissed off seeing Miharu is clearly happier by Rio's side than his while Aki is sad for not being able of talking to her, then Masato begins to fulfill his promise of making sure Takahisa sees reality by saying harsh things to him,.

Don't get it wrong I haven't forgiven you, I'm here because I think is the right thing to do, or because Miharu-nee-chan isn't coming you no longer care about me? you were always saying that Haruto-niichan was a criminal and you're a perfect criminal yourself too, Takahisa doesn't answer to Masato, he just goes to magic boat while thinking what is the difference between him and Rio and they go to Centostella like that.

WN Route
After being transported to another world, he is captured along with Aki by slavers. Rio rescues them and takes them to his Rock house in another dimension. Masato expressed disgust with the fact slavery existed in this world, finding it lazy and immoral. Rio didn’t disagree but reminded him different worlds have different ideologies of right and wrong (he himself was a victim of injustice that went unpunished).

His first day on the rock house he would spent it alone with Aki while Rio took Miharu to Amande with him for buying his daily necessities, the next day Rio took the rock house until Amande's outskirts and told the three to wait there for him until he comes back in three days at maximum from visiting Celia, in the end Rio came back that same evening to the rock house, the next morning when getting for having breakfast he would meet with the just awoken Aisia.

For the next month-month and a half Miharu, Aki and him stayed in the rock house studying from morning until night the stralh's language while at the same time he asked Rio several times to be taught swordcraft.

One day Rio the decided to take Miharu, Aki and Masato to a good restaurant in Amande as prize for their effort in learning the Stralh's language, while the girls were buying dresses Masato accompanied Rio while he looked for a sword and shield for him to use during and after his training.

Later while everyone was having lunch in the restaurant Stead and Alphonse invaded the room and tried to kill Rio abusing the law of the impolite strike, after dealing with them Rio took everyone back to the rock house and began Masato's lessons, Rio having realized how Masato was still treating being in another world a little like a game decided to show him reality pointing his killing intent at Masato during his lessons, the Masato that learnt true fear was able of taking Rio's lessons while dealing with it.

Five days later, while Rio was in Amande receiving Liselotte's apologies for the incident with Alphonse and Stead, the rock house was attacked by a group of monsters controlled by Reis, he would try to join the fight by Aisia stopped him and fought against the monster with just a little of help from Celia, after Rio came back he stayed another month and a half in the rock house until two days before the beginning of the evening party. Miharu, Aki and him were taken to Galarc's capital and stayed at an inn, there while Rio was at Liselotte's house.

The night of the first day of the evening party everyone went to a rocky area in the outskirt of Galarc's capital where they set the rock house for receiving Satsuki's visit after Rio brought her flying. Satsuki, Miharu, Aki and Masato talked about their lives since the hero summoning, after that Satsuki told them that Takahisa could be the hero from the Centostella kingdom, that after being reunited again they would have to choose who to stay with, and to be prepared for the possibility of everyone choosing a different path.

The morning of the third day of the evening party, due to Takahisa leaking Miharu's, Aki's and his existences to Franois and Liliana the three were taken to Galarc's castle for meeting Takahisa, at the beginning Takahisa was happy about meeting with him, but when Masato said to him that he preferred to live with Rio instead of going to the Centostella kingdom and that he has been learning swordcraft Takahisa was really angered and they had an argument, Masato was made to assist to the evening party that last day, after the evening party Rio tried to give him a letter where he explained to Masato about his previous life as Haruto, his older stepbrother, and about his plan of revenge, but he was already asleep.

The next morning Rio tried to give him the letter again, but he wasn't in the room at the moment, while he didn't was back Takahisa read the letters addressed to Miharu and Aki and stole his too, when he came back Takahisa and Aki deceived him and Miharu for taking them to the Centostella kingdom without their agreement, a little after he arrived to the kingdom he had a mock battle with Takahisa and won it, after losing Takahisa was supposed to apologize with him and Miharu for taking them with him in that way and to explain them his reasons, Takahisa didn't keep his promise and since then they are in a cold war state.

Relationships
Rio: his older step brother's reincarnation, he treats him as his older brother.

Takahisa Sendou: his older brother.

Aki Sendou: his older step sister.

Miharu Ayase: he treats her as an older sister.

Satsuki Sumeragi: he treats her as an older sister.

Lilianna Centostella: a lot of readers hope to see him stealing her from Takahisa.

Abilities
While his physical strength and magical power are inferior to his brother, Sendou Takahisa, a hero. His martial skills with a sword are superior. Masato learned to use Spirit Arts from the residents of Seirei no Tami. Given his large power potential, as most earth-originated humans do, he is able to make good use of the Spirits Arts rather than rely on Magic Arts.

Etymology

 * Sendou means "thousand" (千) (sen) and "hall" (堂) (dou).
 * Masato means "elegant, graceful" (雅) (masa) and "person" (人) (to).