Age: 14 (at the start), 18 (by the end of the series)
Yuusuke has brown eyes and short black hair, which he styles with hair gel to keep it slightly spiked. He has about half a dozen small bangs that remain unspiked. Instead of wearing the standard blue uniform of Sarayashiki Junior High, Yuusuke opts for a green one, defying the school's strict dress code. Throughout the series, his clothing changes but generally consists of some form of fighter’s attire. Despite his slim build, Yuusuke possesses unusual strength. At the beginning of the series, he is noticeably short, as pointed out by Keiko when she notes he is shorter than her.
With no father figure and a mother who is often absent, either getting drunk or partying, Yuusuke grows up in a neglectful environment. He is quick-tempered, impulsive, and enjoys intimidating those who fear him. His love for fighting becomes more evident as the series progresses. Yuusuke is frequently described as unintelligent and sometimes downright foolish. However, his desire to fight stems from enjoying a good brawl rather than a need to kill, which he avoids if possible.
Although most students fear Yuusuke and nearly all teachers severely dislike him, he is often misunderstood. Keiko Yukimura is one of the few who sees Yuusuke's true kindness and sympathizes with his life struggles. They quickly develop strong feelings for each other, and Yuusuke is fiercely protective of Keiko, always worrying about her well-being. Initially, Yuusuke does not like Kuwabara, but over time they develop a mutual bond and respect. Kuwabara is the only person who truly understands him. Yuusuke and Hiei have a serious rivalry, and at times, Yuusuke seems almost intimidated by Hiei’s exceptional skills. Nevertheless, they respect each other and are willing to risk their lives for one another. Yuusuke is very close to Kurama and has great confidence in him, often seeking Kurama's wisdom and leadership advice when unsure of what to do.
