very direct and cruel with a side of malice.Hiyoko's cute appearance, voice, and (initially) her way of talking give off the impression she is innocent and childlike.While not violent towards people (presumably due to her diminutive stature), Hiyoko often shows similar mean behavior towards them.She constantly judges others and patronizes them with rude insults, and sometimes with swearing.Hiyoko acts very different towards Mahiru Koizumi after becoming attached to her.