

Nonoha is Kaito's childhood best friend and takes care of him by cooking for him and making sure he attends school. Rook treasures his friendship with Kaito and still feels guilty for everything he did to Kaito. When Rook returns in the following seasons, he becomes an important ally and informant to Kaito. Rook slowly becomes mentally unstable and obsessed with Kaito, influenced by the Orpheus Armband, causing Kaito to do everything in his power to save him and remind him of how puzzles are meant to be fun.

When Kaito sees Rook again, they appear to be on good terms but Rook, being the head of the POG in Japan, has ulterior motives.

One day, Rook mysteriously disappears and he doesn't come back for a while. He first met Rook in the forest where they bonded over puzzles (Rook would make the puzzles and Kaito would solve them) and it is during this time they met Jin Makata, who they both looked up to as a mentor. Rook was also Kaito's while he was at the Academy as his advanced solving skills (and not being able to understand English) ostracised from his classmates. Kaito is Rook's only friend from childhood and they met while Kaito was a student at the Crossfield Academy in England. Plot Season One Season Two Season Three Synopsis Relationships Rook Banjou Crossfield If the puzzle challenge is tougher, Kaito will display his concentration, intuition and insight skills. He is a natural Solver who is fond of solving puzzles more than anything else and is able to perceive the feelings of the puzzle creator. Kaito also is rather blunt, not seen to beat-around-the-bush at any time, speaking his mind. In Season One Kaito seems to be relatively uncaring about things in general, and often does things he knows aren't allowed or he is advised not to do such as building a maze out of school desks and going to the puzzle club when Nonoha advised him not to because he'll get into a fight.

In later seasons he is seen with a sleeved shirt. His pants are baggy, green and have two long straps going down to his knees and his shoes are also red with black socks. He is seen wearing sunglasses in his hair and a red unzipped vest over a no-sleeve black shirt. Kaito has messy brown hair that's partly tied into a short ponytail.
