

He tries his best to understand those around him and encourages them to give it their all when faced with challenge, helping Nozomi take her dream of being a top idol seriously and Aoi's social anxieties.

His honesty, while sometimes frank, shows that he has nothing to hide, yet is also willing to keep a secret for his friends if it means respecting their privacy, something that has earned him the trust of others and has allowed them to open up to him. This trait has allowed him to form friendships with multiple people. He is willing to go out of his way to assist someone, rarely thinks much of what he does and never asks for anything in return, unless it is insisted upon by whoever he helps. As shown in his childhood with Saren, he is quite selfless and protects others when they need help, even if he puts himself at risk for their sake. He also had a dry sense of humor, which, coupled with the above, made him come off as a bit of a jerk to some, such as commenting on how ineffectual Okto, Nouem and their little gang were as "villains" despite being part of the Seven Crowns, which Fio and Rei chastise him for. While Yuuki used to go along with a lot of his friends' antics and quirky behavior, he would occasionally make it a point that they needed to behave themselves to not cause unnecessary problems, usually ones that involve him getting the end of the stick despite being the one that tries to defuse the situations. Though being a friendly and approachable guy, he was not above making snide remarks at anything he found to be inconvenient or annoying, with some of his comments coming off as grating, calling out Fio when she poked fun at him for not knowing anything for being a newbie. In the first game, Yuuki was shown to have quite the sarcastic side. In the anime, his outfit had a few changes, the shoulder plate and the red strap were removed and he does not wear any additional armor on both of his legs. During certain stills, he wears the Tsubakigaoka Metropolitan High School's male uniform, which consist of a white shirt underneath a dark blue blazer, grey pants and black shoes. In the real world, Yuuki has a similar appearance to his in-game appearance. He has a blue belt with a golden belt buckle and a red strap for holding on to a gray sheath. He also wears brown pants and dark brown boots. He wears a pair of dark brown leather gloves on his hands. He wears a black and teal outfit with a blue cape around him and an armor plate on his right shoulder. In the second game, he is given a clear appearance, with Yuuki sporting unkempt black hair, teal eyes and he has an average, yet sturdy build. In the first game, Yuuki was presented as a faceless, first-person character.
