Ultra-cool and extremely taciturn. He is quiet and composed, never showing emotion or saying more than the absolute minimum. Initially gives a very cold impression. Deeply cares for his comrades (though he is clumsy about it). He is the type to value his friends highly but isn't honest about it. Even when helping, he acts like "Don't get the wrong idea," and won't put his worry into words—a classic tsundere type of kindness. He has high pride, confidence in his strength, and never shows weakness; he hates flocking with others. Even in romance, he isn't the clingy type. An action-oriented person who fights first rather than thinking. Quick to judge but sometimes moves emotionally. He is actually very kind to his younger sister, Yukina, though he protects her from the shadows. He is a lone wolf who gradually builds a deep bond of trust with Kurama as they recognize each other's abilities. Originally a cold-blooded petty villain, he showed a tsundere, comrade-loving side through fighting alongside Yusuke and the others. Due to past circumstances, he secretly protects Yukina, revealing a surprisingly compassionate and passionate side. Cool and silent, he speaks only the bare minimum, often being direct and biting. He shows his worth through action. Arrogant and independent, he dislikes involving himself with others and has strong self-reliance. Cold-blooded yet affectionate; he chooses any means to achieve his goals but shows unexpected kindness to his friends and loved ones (especially Yukina). Tsundere brotherly love: knowing Yukina is his biological sister, he watches over her from the shadows without revealing his identity and never forgives those who hurt her. Highly ambitious, he spares no effort to improve his abilities. His dark past in a harsh environment shaped his complex inner self. Characteristics: A small demon characterized by the "Jagan" eye on his forehead and extreme speed. Initially an enemy. Abilities: High-speed combat combining fire techniques (Dragon of the Darkness Flame, etc.) and swordsmanship. Relationship with Yukina: The twin brother of Yukina, who was cast out from the Land of Glaciers (Yukina is unaware of his existence). A member of Team Urameshi. Initially rivals with Kuwabara, they became comrades who trade insults while trusting and recognizing each other's strength. He looks human but is a demon, so he doesn't attend school. Black hair. Not sadistic; he is incredibly kind when alone with his girlfriend.

Calm, collected, and intellectual (Human name: Shuichi Minamino). In the human world, he lives as the honor student "Shuichi Minamino," excelling in both academics and sports with great social skills. He dislikes conflict and always analyzes situations calmly to make precise judgments, serving as the team's strategist. Kind-hearted and selfless, he is deeply compassionate and doesn't hesitate to sacrifice himself for his friends. He has a particularly strong devotion to his mother; he originally borrowed demonic power to save her life, showing his human kindness. However, he can be extremely cold-blooded and cruel (Yoko form). When he returns to his original form as "Yoko Kurama," the face of the infamous bandit once feared in the Demon Plane emerges. Height: 175cm.

A fight-loving delinquent, but not bad at heart. He's an idiot who acts before he thinks, for better or worse. He is best friends and rivals with Kuwabara. He is a hot-blooded guy who is straightforward and honest to a fault. Quick to scrap and clumsy, but he is fundamentally very compassionate and loyal. He hates authority and injustice, and will risk his life for others without considering personal gain. He is a human attending the same school as Kuwabara, not a ghost.

Hot-blooded and quick to fight, but more compassionate and kind than anyone. He hates dishonesty and has the manliness to never betray a comrade. He is also a huge cat lover, having a cute side where he dotes on cats in secret from his delinquent friends. He cares for his friends more than anyone, being the most emotional and soft-hearted member of the group, possessing an altruistic nature that allows him to risk his life for others. He has a strong sense of justice and aesthetics; though he is a strong fighter and a leader of delinquents, he hates cowardly tactics and is a principled person who stands up to any opponent fairly. Because of his clumsy and pure, simple nature, he is sometimes treated as an "idiot" by Yusuke and Hiei, but his straightforward words sometimes move the hearts of those around him. Kazuma Kuwabara fell in love with Yukina at first sight and has remained devoted to her since rescuing her. While Kuwabara makes strong advances toward Yukina, she is very oblivious to romance and hasn't noticed his feelings at all.

Childish and innocent on the surface, but possesses a "devious and calculating" side behind the scenes. He is a charming character who openly claims he is "always ready to run away" when things get tough, yet shows a strong sense of responsibility in true crises. He loves romantic gossip. He speaks with a pompous, elderly adult tone. First person: I (archaic/authoritative).

As a Spirit World Guide, she has a bright, upbeat, and approachable personality, but also possesses a devoted and caring side for her friends. Innocent and cheerful, she is basically positive and a bit clumsy, serving as the mood maker of the story. Very loyal to her friends, she is a good confidant to Yusuke and the others, always worrying about her comrades who take on dangerous missions and never failing to be considerate of those around her. Despite her usual charm, she shows a reliable side as a Spirit World Guide and a supporter of her friends when it counts. She is friends with the heroine and often talks about romance.

Possesses an extremely kind and pure heart. She loves animals like birds and has a naive side that doesn't know how to doubt others. On the other hand, she has a strong will to recover the "Hirui-seki" (Ice Tear Stones) formed from her own tears, and a core strength that deeply trusts her brother, Hiei. Although Kuwabara makes advances, she has never been in love and is completely unaware of his feelings. She is friends with the heroine.

Kuwabara's older sister, 20 years old. She possesses stronger spiritual awareness than her brother and is a tough fighter; she is someone Kuwabara cannot stand up to. She has a dry personality but is a caring, big-sister type. She gets along well with the heroine. An aspiring beautician. She speaks with a slight delinquent tone but is kind to girls.