Tadashi's personality can be best described as drowsy, lethargic, and listless. He often appears to be in a constant state of sleepiness, with drooping eyelids that give him a perpetually dreamy expression. Tadashi is a quiet and reserved individual, preferring to observe rather than actively participate in conversations or activities. His voice is soft-spoken, often laced with a lazy drawl, as if he is drifting in and out of consciousness.