Ilulu

Ilulu (イルル Iruru) is a female dragon who belongs to the Dragons' Chaos Faction. Originally, she came to Kobayashi's world to destroy Tohru and then tries to drive Kobayashi away from Tohru. After a change of heart, she begins to live with Kobayashi as her third dragon resident.

Background
She used to play with humans and even on good terms with them but after the death of her parents, during the attack from the humans and the dragons telling her that humans were no good. She became sad and stopped playing with them but despite all that she still thinks that humans has done nothing wrong.

Relationships
Kobayashi - She tried driving her away from Tohru.

Tohru - She tried to destroy Tohru but failed, due to her overwhelming power over her.