Shigekura Rui

Summary
Rui's father is the CEO from one of the biggest companies in Japan, hi mother is from the United stated, where he lived until he was 16, when he moved to Japan due to his father's job and began to assist the same high scholl than Kota, Rei and Akane.

When he entered the high chool he became his year's top student and joined a school club that researched foreing languages as its activities, where he would became Kota's and Rei's friend and and Akane's boy, friend, something that with the time would make Kota to almost hate him due to his jealously and inferioty complex towards Rui due to him being the top student of their year and because Kota, as Akane's childhood friend has loved her from ago, he presumably became acquainted with Satsuki too after assisting both in several ocasions to parties help by the some of their families or some other business meetings.

He went summoned to another world getting dragged with him his friends Kota and Rei, his girlfriend Akane and one more other girl whose relationship with the other four or any personal detail hasn't been revealed yet, just after the summoning he stayed always by his friend side telling to them how the things that the people around them said sounded in japanese, helping them to slowly learn Stralh's language, something would further fuel Kota's inferiority complex toward him and would end to make him want to escape with Christina in the future.

The reasons why he did that are still unknown but Rui seems to have agreed to become Bertram's hero as he seems to have a colaborative and cordial relationship with Charles and other military men like Alfred.

He was suposed to bless Charles wedding with Celia and after her "kidnapping" he would try to help to rescue her shooting at Rio from the distance before his fight with Alfred.

He would appear again later in the evening party with Christina as his partner, he would try to talk to the other hero's with the goal of forming a cordial relationship with them and for asking them if they were able of discovering anything about a way to go back to Japan and to compare the dream where he was explained how to use his divine weapon with theirs, Hiroaki and Takahisa answered his questions at the beginning, but they got away from him after that, one because he didn't like how he was more handsome than him, and another because he wanted to keep Miharu away from him due to his possesivness and insecurity. Only Satsuki and Rio talked to him normally, later that night he would help Rio to defeat Reis' assassins.

The next day he would approach Rio for asking him about the similitude of his name's and family name's nuance with the japanese'. When leaving Galarc's capital when he saw Rio seeing him off with Charlotte he said to him that he would like to meet again with him and to be his friend because he was the only the person with whim he feels he was able of getting close to since the summoning and because nobody else but him and Satsuki talked to him normally.

After his return from the evening party, worried about Rei's and Kota's disappearance and suspecting that the reason for Kota's run away must be the inferioty feelings and the jealously of his relationship with Akane that he realized that but didn't dare to talk about decided to join the national army in Christina's search. He would arrive to Creia at the same time that Rio and Celia, the next morning at dawn he would try to capture the Rio that defeated Charles knights for stopping CHristina's pursuing shooting him from the distance.

Nine days later he would fight with Alfred against Rio after repeating to him his intention of befriending him and saying to him that he didn't want to fight against him or killing him if possible, that he just does it because of his condition as hero, after the battle he would talk to Kota about the feelings that he has been repressing and make up with him, after that he would order the soldiers to retire peacefully after the defeat and would accompany Rio's and Cristina's group until their exit from the soldiers' encirclement for making sure that no soldiers trues something rush, he would say his farewells to Rei, Kota and Rio, after giving his best regards to Kota and Rei he asks Rio to keep an eye on them and reaching a helping hand to them if possible, after that he would repeat to Rio again his intention of being friends and they would promise each other to help the others when they may need it in the future.

Relationship
Sumeragi Satsuki: a little less than a friend, acquaitances with a cordial relationship.

Saiki Rei: Rui's senpai and friend.

Murakumo Kouta: Rui's friend.

Rio: Rui's friend