Charles Arbor

Helmut Arbor's eldest son and heir, the royal guard's vice commander until Flora's kidnapping when she was 6 years old, he tried to force Rio to confess forcefuly to be Flora's kidnapper torturing him and that way to try to protect his position with the fact that he captured Flora's kidnapper but he wasn't able of it because Flora woke up on time for confirming Rio as her savior, hours later he would be demoted and his father expelled from the royal guard, five years after that he would try to tale the chance of fighting against Rio in the match between students and knights for giving Rio serious wounds but he lost against Rio in one hit.

Two months before the hero summoning his family would take control of the Bertram kingdom thanks to its secret pact with Reis and he would take control again of the national army and a new knight order made just of the most skilful between the loyals to his family, he would try to accuse Celia's father of treason after his help in Flora's and the Hugenot's faction run away, after that he would force Celia to get engaged with him for making of her a hostage that should ensure the cooperation of her father in discovering all of the nobles of the Fontine's faction in contact with the Hugenot's faction, Rio kidnapped Celia and his plan failed.

Weeks later for the sake of pretending normality after Celia's kidnapping he would assist along Rui and other members of her faction to the evening party held in the Galarc kingdom, for the sake of pretending to have a good relationship with the royal family he made Christina Rui's partner for the party and during the party he and his loyalist would always keep and eye on her for making sure that she wouldn't make contact with Restoration's members and would try to keep her conversations with people from the Galarc kingdom to the minimum too, like when he tried to make Rui's and Chistina's farewell from Rio and Charlotte as shortest as possible.

When Celia's father helped Christina to escape from Bertram's capital he would be the leader of the forces searching for her until he's used for Reis in his plan for making him the one who captured Christina after her run away, then after the battle at Bertram's and Galarc's border he would be captured by Rio made a prisioner of war.

Personality
He would always treat badly those who he considers to be superior to him in any aspect and since he recovered his post he would always use his higher rank for denying the ideas or words of those like Alfred towards who he has an inferiority complex. Average in every aspect and always trying to deny that ordinarity by putting people that he considers to have more skill than him in ranks below his, whoever person working for him would automatically become an elite just because he is the boss, the ones under him are elites and he's the top of that, he always tries to give that kind of image.

Relationships
Rio

Before entering the academy, Charles punished Rio by means of torment to try and get a false confession from him until Charles released Rio with Vanessa's words, Rio was disgusted and slapped Vanessa's hand with aristocratic hatred like Charles. Five years later, Rio faces off against Charles in an annual tournament between the students of the royal academy and the knights of the kingdom. Rio beat Charles with a counter almost immediately, further humiliating Charles. Four years later, Rio kidnapped Celia from the marriage between her and Charles, stepping on his back and threatening to break Charles’s spine. Rio does not accept the fact that Celia is forced to marry Charles, this is likely due to Rio knowing Charles's bad personality from his past. After Christina escaped, Rio saw Orphia and Celia look in pain, causing Rio to become incredibly angry, to the point of scaring Christina. Rio, in his rage, beat Alfred and Shigekura Rui in a two-on-one battle. After that, Rio then marched through the remaining Beltran kingdom forces, grabbed Charles's neck and dragged him to Christina. After Charles’s interrogation, Rio provoked and ignored him with hatred and disgust. Charles does not know Haruto was the Rio he knew in his past.

Celia Claire

Charles is attracted to Celia due to her cuteness but also her achievement in magic. The Claire family is in a hard position, they have helped Flora and the Huguenot flee from the capital. This was the reason why the Arbor family forced the wedding between the two families. Despite being a political wedding, Charles believes until the very end Celia has fallen for him.

Alfred Emal

Charles is extremely jealous of Alfred because the latter is a better swordsman and commander than him. Charles takes advantage of his position to belittle Alfred (who does not seem to care much).

Reiss

They work together to gain power and mine the relationship between Beltram and Galark. However Charles does not see that through praise and sweet talks Reiss manipulate him.