Hayner is impulsive and determined, and is always looking for a new adventure. He is bold to the point of recklessness, once even charging Axel unarmed. He gets bored easily during uneventful times, as demonstrated when he constantly pesters his friends to do something during their summer vacation. Hayner is also easily angered/irked, as shown in the very first scene in Twilight Town when he tells Pence, Olette and Roxas about how everyone labeled them thieves for stealing photos. He thirsts for some kind of recognition, as he is even irked when Roxas defeats him in the semi-final round of the Struggle tournament, leaving Hayner in fourth place (Hayner is soon moved up to third place when Seifer withdraws from the match).