Wakka

Wakka is a minor character in the Kingdom Hearts series, originally from Final Fantasy X.

Kingdom Hearts: Light by Darkness
Final Fantasy X

''The oldest kid in the bunch. He is very close friends with Selphie and Tidus, looking out for them like a big brother. Wakka is a very modest guy, caring for all his friends.''

Kingdom Hearts: Light by Darkness
Wakka is first seen at the school's rooftop, where Riku usually hangs out before school starts. Wakka suggests for a little spar, just to wake the both of them up. After some thinking, Riku accepts, and Riku ultimately wins the match. A little after school starts, the Heartless invade the world, and Wakka helps fend off them.

Later on, after the incident, Wakka is able to battle as an optional boss for all of the players. He also gives a quest to the player.