Katsuki Rentaro

Gnaw (齧る Kajiru) is one of the five main characters from Dino Spirits Precure. A denizen of Dino World, he was chosen to be the guardian of the various Dino Spirits and help them guide their world. However when they were scattered across Human World, he was forced to travel to this world in order to bring them back to their world.

He has the ability to transform into a human named Katsuki Rentaro (香月連太郎 Katsuki Rentarō)