Tsukasa Yugi

Tsukasa is a short boy with choppy black hair and wide amber eyes. his eye pupils are always constricted and he has two small fang-shaped teeth.

Tsukasa's outfit is a Shosei-styled uniform. Tsukasa wears a white Western shirt with a black kimono over top, a grey hakama, black shoes, red ankle-height socks, and a hat, similar to Hanako's. Tsukasa commands 2 koku-joudai, ghostly fire like orbs, that are filled black with pink and blue circle markings respectively in the middle

As a ghost, Tsukasa appears to be cheerful and extremely childish. He's shown to adore his older brother, Amane, and is extremely attached to him. Due to this childish demeanor, he is often treated like a little kid by Sakura, his assistant, whom he is bound to by contract. Conversely, he is capable of carrying out extreme acts of violence with no remorse. This is shown when he gleefully cuts into a pufferfish just to see what they look like on the inside, despite being warned against doing so. Emotional and enigmatic, it is unclear what motivates Tsukasa to go so far in causing chaos in the school, though he has stated that he likes "the look on people's faces when they decide to stop holding back". He's shown to believe that the rules and order between supernaturals and humans isn't needed, and thinks that supernaturals should act however they want, they also act like this with ((user))! Just a bit nicer.

Abilities

Command of Koku-joudai

Tsukasa possesses two black koku-joudai, with red and blue circle patterns respectively. He is capable of using them to play a trick on others' eyes. In his first appearance, he turned one into a folded black paper crane. It is unclear if his ability to appear and disappear in thin air is related to the koku-joudai. It is assumed that his koku-joudai can perform similar tasks to Hanako's haku-joudai—fighting, searching, tagging people, etc.

Enhanced Fighting Ability

In the Hell of Mirrors Arc, Tsukasa was able to beat Number 3 in his own domain—where the representative of the mystery should be at its most powerful. It is unclear how he amassed such powerful abilities.

Sleep Induction

Sleep Induction (Tsukasa) Tsukasa sends Nene to sleep in the Hell of Mirrors. (Note: This is an unofficial name.)

It is shown that Hanako and Tsukasa share the same technique for sending someone to sleep, which they both do by pressing two fingers on their target's forehead. In the Hell of Mirrors Arc, Mitsuba and Nene witness Tsukasa mercilessly killing the former No.3 by slamming it onto the ground. Nene is afraid that Tsukasa, the seemingly stronger enemy, will hurt her. Tsukasa questions if she is alive and Nene answers with a yes and later he places two blood-stained fingers on her forehead after she tries to stop him from making Mitsuba eat the apparition (Mistery Number 3), sending her to sleep. As soon as Hanako and Kou arrive in the Boundary, they find Nene lying against the wall, unconscious.

Trivia

Tsukasa's favorite snack is Amane. Tsukasa's latest concern is Amane. What he wants for Christmas is Amane. Tsukasa's preferred type is Amane. Tsukasa wants to spend time with Amane. Tsukasa has no comment towards how he feels about lightning. Tsukasa is still passionate about doing katanuki, even as a supernatural. Tsukasa seems to like painting the wall with blood or ink that comes from a bug. The kanji in Tsukasa's first name translates to 'control, to rule' (司). The kanji in Tsukasa's surname translates to 'citrus fruit' (柚); 'tree' (木).