First of all: thanks for replying
@ Efflixi & Draklar: You really have a point. I think the grinning face makes the creature look too intelligent. I guess another point is, that it looks like it could talk and that doesnt suit a pet.
@Zellgadess: You said what i had in mind: there are many wizzards who have demonic familiars, why not a little demon itself? As I know it from other RPGs, a familiar is a summoned ghost form another plane, which takes the shape of an animal to be able to stay on the plane of its owner. The thing i drew would be such a ghost or demon, which was able to keep his own shape. (and to what you said about the aura-thing: you re right, look at the 2 pictures i posted here :)
@ Efflixi & Draklar again: In fact the creature is an adaption from a creature i drew some time ago... this explains why it still looks too smart:
supersmart-version:

scribble: