Haya is the 14th enemy to be added to Oh So Hero!.

He is an anthropomorphic white rabbit with poppy colored eyes and rose colored facial markings/make-up similar to the ones worn by the Ninja Clan. He also dresses similarly to them as a shinobi shōzoku, wearing a black jumpsuit with metal plates on the arms, shoulders and hips; as well as a forehead protector.

Haya appears in the Hiroto Dojo alongside Bax, Puca and The Ninja Clan.

The Hayas wield a Fuuma Shuriken (Wind Demon), a large propeller like blade which he can throw a moderate distance away from himself while moving. The Fuuma Shuriken will boomerang back to Haya after it travels a certain distance from him. Haya can throw up to two Fuuma Shurikens, one in front of him and one behind him. He can also throw it high enough that Joe would need to slide under it. Or low enough that Joe would need to jump over it. Combine this with the fact that Haya has poise, and he can become a somewhat challenging opponent.

They also have a seductive taunt where Haya strikes a seductive pose while lowering his pants. This creates a large pink Hira Shuriken with the same size, hitbox, and boomeranging properties of his Fuuma Shuriken. This attack is known as the Sexy Star and inflicts lust damage. Haya will use Sexy Star after he lust is increased to 50%.

With version 19.100, Haya's missing sex scenes were added and his A.I. has been completed. He also gained a grapple in the form of a short range grab.

With version 19.200, Haya gained it's seductive taunt.

• Haya's outfit seems to be heavily based on the outfit worn by The 3rd Hokage Hiruzen Sarutobi from Naruto. At least the one he wore in his latter years.