Vivi was an interesting concept done very badly. They tried to use him as a vehicle for whatever existential message they were pumping, but ended up turning him into this wristslitting emo kid who did nothing but whinge and moan about not being real or some for the majority of the first half of the game. The dialogue in the Gizamaluke's Grotto and Burmecia segments just make me want to give him a slap.