Kingdom Hearts har har I kid, in all seriousness let's go with...Guild Wars 2? (Also hey I remember Golden Sun! Barely but I know I played at least a big chunk of it back in the day)
Basically Rue and Mint are two protags. Rue can turn into some of the monsters you fight and Mint can use a variety of magic. I actually think of it as a dry run for some of the stuff they'd implement in Kingdom Hearts years later as far as the magic and Rue having a weird weapon anyway.
(Also hey I remember Golden Sun! Barely but I know I played at least a big chunk of it back in the day)
KH if I didn't play Kairi I'd play Strelitzia