There are regular pillows that we sleep on, and then there are longer, anime character-clad ones that are used for…other stuff (don’t ask). Most of them are of cute middle or high school-aged girls, but here are some characters you probably won’t be cuddling with. By probably, I mean hopefully.
Master Roshi
Aside from the fact that he's super old, he'd be a weird choice. Dragonball is a shonen anime with a dominant male cast and therefore plenty of other guys to choose from -- that is, if you're one of those guys who watches Dragonball and no other anime.
Exodia
Look at that angry face. Who wants to look at an angry face like that?
Lord Death
Spike
Some people have body pillows of the ponies, but unless you're Seto Kaiba, dragons are out. Especially baby dragons, because that's creepy (besides, they're annoying, anyway).
Gluttony
No. Just no.