He is a Blue demon. He is used for pleasing the higher ranking demons. He can easily get flustered and he is gay so it makes it easier to get him to do stuff. He doesn't take a liking to anyone who is harmful.
Delineate Your Lips Mouths, lips, girl, woman; How to Draw Manga/Anime - How to draw lips correctly? The first thing to keep in mind is the shape of your lips: if they are thin or thick and if you have the M (or heart) pronounced or barely suggested.