Chobi

Chobi is a Chocobo encountered by Yu and Ai on their first trip into one of the Inner Worlds. Chobi acts as the anime's annoying comic relief.

Chobi quickly befriended Yu and Ai when the former found a Chocobo feather which he wore as a hairpin. This enables him to understand Chobi. In the Japanese version, Yu named Chobi after chocolate bars; as he sings the "Chocobar" song. Ai is constantly annoyed by Chobi because the Chocobo loves to grab her by her hair and flail her around; this become a constant gag in the anime, and at an unusual time, saved the twins' lives.

Chobi also acquired the taste for Dead Peppers, and after munching on some would usually go around screaming and breathing fire. Chobi later acquires a power-up when they arrived in the ancient Ciel ruins, becoming the legendary Ciel Chocobo, enabling him to fly in a flashy white suit of armor and gain extra strength.

The chocobo is the Hayakawa twins guide to riding the interdimensional subway using the necklace worn on its neck. This necklace in turn is actually Oscha's tracking device.