Here comes the idea!
The PC looks like a little batman, a crappy one:
-He's wearing black, with a black mask of a bat
-He's scared by the dark
-He think he could become invisible putting his cloack on his face(and maybe really could, but he think that also when he couldnt)
-He think he can fly, but he's afraid of heights
-If being scared start to scream in face of the nearest person
-If someone has a good idea, he ignore that then say to all he had a good idea and copy the idea that person just explained
This is what my mindless brain created... i need help to definite the class, and maybe the build :3
mindless dbag class sounds about right
Lets take a step back. You want to play a bat.
Some sort of bard that has invisibility and sonic spells. Scared of the dark? Find a way you get darkvision. Lots of races have it.
Also it sounds really annoying and antagonistic. The goal of Pathfinder is not to get other players to want to punch you - so just be careful on how you implement some of these concepts.