He is voiced by Yuuichirou Umehara in the Japanese version of the anime, and by Ian Sinclair in the English version of the anime, both of whom have also voiced Mitsuhide Lowen from Snow White with the Red Hair.
He has auburn hair and reddish-brown eyes.
He is depicted as a polite and selfless young man. Arisa Uotani describes Kureno as "like Tohru" because of his over-the-top politeness and scatterbrained idiosyncrasies, and Saki Hanajima and Akito Sohma both compare his selflessness to Tohru's.
According to Natsuki Takaya, while he was still cursed, he did not like others to see his animal form, which was a sparrow instead of a Rooster.
In an author's note, Takaya described him as possibly the most lonely of those affected by the curse, because of his isolation.
In his mid-teens, about ten years before the series begins, Kureno's curse was somehow broken, but because of Akito's distress he promised never to leave. Kureno and Akito have a sexual relationship, and when Shigure learned about it, some time before the start of the series, in retaliation he slept with Akito's mother, Ren. Akito keeps Kureno away from the rest of the family to hide that he is no longer cursed, and Kureno does most of Akito's work as the head of the family.
As a result, Kureno is so sheltered he is 26 when he first visits a convenience store, where he meets Arisa. Despite their mutual attraction, he stays away from her because, he claims to Tohru, of his promise to Akito. When Akito locks Rin Sohma away for trying to steal her father's box, it is Kureno who frees her.
As the zodiac curse begins breaking down, Kureno eventually admits he is partially responsible for keeping Akito coddled and fearful by being too obedient, and Akito angrily stabs him in the back. When Kureno is released from the hospital, he moves out of the Sohma compound with Arisa's help, and in the final chapter, Arisa is preparing to move in with him.
He never blames Akito for his injury and still feels a responsibility to care for her. He says the best thing he can do for her is to erase his existence. Hence his moving out of the Sohma home.
- He is the first of the cursed Sohmas to have his curse broken.
- Like Isuzu Sohma, he never make appear in 2001 Anime of Fruits Basket but he appeared in the anime as the finch constantly in Akito's company.
- Takaya derived his name from the third month of the traditional Japanese calendar, kurenoharu or "late spring"; he was supposed to have been named after the ninth month, the month of the Rooster, but according to the author, she mixed up his and Momiji's positions in the zodiac.
- His Japanese Voice Actor, Yuuichirou Umehara is best known for voicing as Seiya Ryuuguuin from Cautious Hero: The Hero Is Overpowered But Overly Cautious, Goblin Slayer from Goblin Slayer, Goro from Darling in the FranXX and Siegfried Kircheis from Legend of the Galactic Heroes.
- His English Voice Actor, Ian Sinclair is best known for voicing as Brook from One Piece, Mezo Shoji from My Hero Academia, Yu Kanda from D.Gray Man, South Italy from Hetalia, Ginei Morioka from Rosario + Vampire, Daikoku from Noragami, Baldroy from Black Butler series, Otohiko from Kamisama Kiss series, Akane☆Hoshi from Soul Eater NOT!, Kazuichi Banjou from Tokyo Ghoul series, Juzo Sakakura from Danganronpa 3: The End of Hope's Peak High School series and Lawless from Servamp.