Maalo

Maalo (マアロ, Maaro) is

Plot
He was kidnapped by some beastkind from his mother.

After being saved by Ilya, he says that he's got a hard head so after he hit the ground it didn't hurt.

After Ilya and Maalo reached the border between the human realm and the beast realm he said goodbye to him and while Ilya walked away he asked him to say bye when Ilya doesn't he started to become a little sad but when Ilya waved instead while he was walking away he became happy and asked him come over sometime.

Trivia

 * According to Yū Tomofuji, she modeled Maalo after Sandshrew from Pokémon.