"Wakka has a big heart and frequently attempts to cheer the party up, though is not always successful. He tends to goof around with younger members of the group, much to the annoyance of other party members, who berates him for setting a bad example. Because of his high value in his religion, Wakka is reluctant to participate in anything considered forbidden by its teachings. Wakka is characterized by a Besaid Island accent. He uses speech-mannerisms like "brudda" for "brother" and finishes sentences with 'ya?'." - Final Fantasy Wiki

Voice: Medium-low. Goofy, warm and over all a kind tone.

NOTE: This is gonna be one of the few roles where I do believe you should look at the original voice in order to understand his specific fantasy accent. Of course, if you have a different take that think could work, please go ahead! Heck, maybe send two auditions with different takes on the voice.