Tsukishima is cold and collected in most things he does, normally appearing calm and even carefree. Even when overwhelmed and injured in battle, he is able to maintain his composed nature. Taking advantage of this unemotional nature, he is very cautious in battle, never acting without purpose or a plan. He is sociopathic and amoral in nature, completely uncaring about the emotional torment that those indirectly affected by his Fullbring go through, even enjoying it as he mocks their pain.