A slow moving vaccume that will eat anything he can get his mouth on. Hiro is skittish, but skirts around groups of people in the shadows in order to get into and eat anything thrown away. He'll even risk coming up to investigate an area if everyone there is asleep to search for food. Rotten food, sticks and flowers will satisfy him, but he does prefer to eat tastier dishes. A preferance for his own kind, his favorite thing to eat are other slimes, and slime owners, as they smell the same. He'll merely try to steal and work Light elemental slimes into his following however.

There are moments when he'll become small, splitting himself up to create a group of smaller slimes to pile up with. Lonely, but never alone, he constantly travels to find more food, grow, and split again as the 'heroes' always come to cull his numbers for the experience.