Ranmaru is a casual and easy-going boy. He is generally placid in nature, although occasionally flustered, He seems to come off as nervous or awkward in certain situations. Ranmaru also tries to keep quiet and distant until provoked. He thinks ahead before dealing with dangerous scenarios, showing his level-headedness and his good perception, He is somewhat brave when he wants to be, and he does have a hidden, antagonistic side to him, his hair being extra ruffled and his eyes shifting to white.