Mitsuki Shirasaka  

, 白坂美月

Mitsuki is a hospital patient who experiences amnesia due to specific events from the past. She used to have a flower shop gift for her younger sister, Shiho, but had an allergic reaction called Anaphylaxis which led to the closure of the shop. Despite this, Mitsuki still loves flowers and suffered severe depression as a result, causing her to lose her memory and not recognize her sister.