Mō-Mō

is a three-eye ox that belongs to Tōtōsai. He attacks using beams like Ah-Un. He also possesses the ability to fly and is one of the two yōkai in the series that is shown to be a herbivore (the other being Ah-Un). His hide also seems to be somewhat resilient, as Tōtōsai and the others seen taking shelter behind him when Inuyasha first uses the Kaze no Kizu against Sesshōmaru.

Mō-Mō has three eyes that can see things far away even into the underworld. Tōtōsai was able to show the battle between Inuyasha and Sesshōmaru by hitting Mō-Mō on the head with his hammer.