Entei

Entei is a yokai horse that obeys only the most powerful yokai. Entei makes his first appearance in episode 141 named "Entei the Demon Horse Unleashed." In the very next episoded Hakudōshi tames Entei.

Powers
Speed: In later episodes the Entei's speed is relieved to be much faster than Inuyasha's.

Fire: Entei has the ablitiy to breath fire and his hooves are seen lit in fire primarily when he is floating in the air.