Shippo (InuYasha

From Animepedia

Shippo is cowardly fox demon "cub" who gets into a lot of arguments with Inu Yasha, that usually end with Kagome making Inu Yasha 'sit'. (the exception being when he forgot to tell the group that Kirara went with Meoga the flea). He can transform his shape into anything he likes, but his favorite one appears to be that of a little bubble-like monster. Although not as powerful as his father was, he seems to be good at using fox-tricks, which are usually illusions that don't last long. He was able to scare the thunder-brothers (who killed his father) by creating an illusion of a large top. In one episode, he gained the ability to turn himself and other things invisible, but as usual, the effects didn't last long. Shippo has been traveling with Inu Yasha and Kagome ever since he came to know about his father's death, and hopes that someday, he too will become a strong demon.