It's Wonderwice from Bleach.
I think in a chapter he was found with a dragon-fly and ate it or something....I don't remember...but it kind of explains the dragon-fly in the artwork.
I made the frog a hollow XD (lol)
looks like a girl o.o
That's cool. Wonderwice rocks.
I like the little frog hollow!
The hole in his chest means that he is a hollow(a creature of the dead that eats human souls). He is in human form because his leader found a way to make the creatures to look like that. Hope that answers your question.
Thanks for the comments everyone.