黒うさぎ

A black rabbit with white ears. Kuro can frequently be seen carrying his pocket watch, rushing around and agonising over the time. He has a terrible personality and regularly berates or insults those around him. As a result, Kuro doesn't have any friends. When he's irritated or stressed, he has a habit of biting his nails. He was once a completely white rabbit, but stress caused his fur to turn black. Unpleased with his black fur, his constant rushing around has warped him and left him desiring death.

official website's character profile.