Tarou

 is a kind of rodent living in a dark place. Has white and fluffy hairs all around the body. A tiny, little white mouse. Its squeaks can be heard in the Dead Pit and the Prontera Culvert.

Ragnarok Online II
In RO2, this monster comes in 2 varieties: On iRO2, the base monster is localized as Leona.
 * Tarou
 * Flood Tarou