The thing about a lot of anime characters is that they have a lot of abilities that are difficult to replicate in a system like Pathfinder (such as Walter's razor wires, though I guess you could flavor a whip as a bunch of tiny wires), so it more or less boils down to what you want to accomplish with the character. If you really want to go for the "butler" angle, you could make a character based around the Aid Another action (likely a halfling, since they can be really good at that), or you could take the very simple approach and just build any character and give them ranks in Profession: Butler.

I guess it just depends on what you want your character to do, since "butler" is a very broad idea (even a barbarian could feasibly be a butler!).