Kaoruko is somewhat short, even being mistaken as a middle-schooler by others. She usually wears her hair down, with a headband, but often changes her hairstyle when going on a date or going to work. Kaoruko is a very kind person. She thanks others regardless of how small it may be. Kaoruko can sometimes overthink particularly at times and can be easily embarassed particuarly when the other girls in her friend group tease about how she met Rintaro or who he is like as a boyfriend.