Do those twins even have names?

I Believe they do but i haven't played the game in years so i can't think of them. XD

Also, does the monkey have a Japanese name I should know about? Because his English name is Data.

The long-haired one is Yuna, the other's name is Sera.

Oh that's right Yuna and Sera. i just remember the names but looks like someone beat me to it lol. ohi think that monkey name is data in japanese, then again it is tagged XD

Yuna is mother earth in a sense, and Sera is the martians from war of the worlds, but they began as sisters in the same house... sort of.