Kuro is one of the supporting characters of Blue Exorcist. He is a cat sith and Rin Okumura's familiar, but before he was once the familiar of Shiro Fujimoto until his death at the hands of Satan.
He is voiced by Ayahi Takagaki in the Japanese version of the anime and Stephanie Sheh in the English version.
He is a black cat with two tails (which is considered to be sacred in ancient Japan)
Kuro is very childish, and cares deeply for his friends. He cared for Shiro, and was in denial when he died.
He possesses the abilities of change from a small cat into a nekomata, a giant demon cat with immense strength and power, and the demon telepathy, which allow him to mentally communicate with other demons, including Rin.
In ancient times, Kuro used to be the guardian deity of some local silk farmers, until be forgotten by people as the times changed, going berserk, but Fujimoto tamed him and made him his familiar. He soon gained a new role as one of the guardians of the True Cross Academy. After learning of Shiro's death, Kuro lost control and begin attacking the academy, until Rin calm him down, becoming his familiar in the process.
- His name means "black".
- His Japanese voice actress, Ayahi Takagaki, who also voiced Chris Yukine in Senki Zesshou Symphogear, Kaede Amamiya in Star☆Twinkle Pretty Cure, Ayato Kirishima (young) in Tokyo Ghoul, Lisbeth in Sword Art Online, Mary "MK" Katherine in Epic, Erika Karisawa in Duarara!, Lucia Nahashi in Venus Versus Virus, Mariah in JoJo's Bizarre Adventure: Stardust Crusaders, Princess Cadance in My Little Pony Friendship is Magic, Black Cat in Spider Man (2018), Aloy in Horizon Zero Dawn, Lemon Zest in My Little Pony Equestria Girls: Friendship Games, Aria Blaze in My Little Pony Equestrian Girls: Rainbow Rocks, Mikako Satsukitane in Heaven's Lost Property, Yui Goidō in The World God Only Knows, Arcee in Transformers Animated, Clare in Power Rangers Mystic Force, Elda in Tropical-Rouge! Pretty Cure and Ayana Minase in Qwaser of Stigmata.
- His English voice actress, Stephanie Sheh is best known for voicing as Orihime Inoue from Bleach, Hinata Hyūga, Rin Nohara from Naruto series, Megumi Shirakawa from Digimon Data Squad, Yui from Sword Art Online series, Mikan Tsumiki from Danganronpa 2: Goodbye Despair & Danganronpa 3: The End of Hope's Peak High School, Usagi Tsukino/Sailor Moon from Sailor Moon (Viz dub), and Minami Uehara from Digimon Tamers: Battle of Adventurers.