A Hareraiser is a small creature with a slight resemblance to the Tornado Step Heartless. Its skin is predominantly black. It has a wide lower body with a comparatively thin neck. Its body has two short spikes for legs and lacks arms. Its head is large, round, and has two long, floppy "ears", both of which end in a wide fleur-de-lis. The tip of the Hareraiser's outer ears are dark red, while the tip of its inner ears are pink. Its red eyes are set in a sorrowful expression and the Unversed logo is on its chest.
In Kingdom Hearts Birth by Sleep Final Mix, the Hareraiser receive a white body coloration with its ears are a light blue coloration, in contrast to its Kingdom Hearts Birth by Sleep coloration.
The former part of its Japanese name represents its ability to shoot lasers, while the latter part of its name represents its rabbit-like appearance.
One of the weaker Unversed, its only two attacks are to smack players with its ears or spin and shoot lasers from them. However, Hareraiser Unversed very often appear in packs of several Unversed, so long-range magic spells such as Mega Flare and Deep Freeze are a great way to take several of them out without getting bombarded by lasers. To make things easier without magic, use Block to deflect its lasers and send it back at the attacker.
- Cartwheel: Cartwheels around, hitting players with its ears.
- Laser Spin: Spins around while shooting lasers.
- Ear Strike: Shakes its head and whacks the player several times with its ears.