


When practicing gymnastics, she also often feels like her body isn't hers and she cannot execute complicated moves properly despite knowing how to use them. She sometimes experiences bouts of depression for no apparent reason usually if the protagonist meets with her, she will end up with a gloomy mood for the slightest of mistakes, regardless if real or perceived. Her encounter with Takuto Maruki ultimately provided an out by confiding in him her wish to become Kasumi, granting her a sense of escapism by becoming her sister whom she both loved and was jealous of. The trauma of the incident instilled even more negativity and added survivor's guilt to her piling self-deprecation. Her negative reactions to Kasumi ultimately resulted in the tragedy that ended her sister's life. Her self-loathing created a despondent reaction to Kasumi's attempt at consoling her, believing it to be patronization rather than the genuine care she had. She has told the protagonist that Kasumi does most of the work for the twins bar preparing dishes, including arranging her very own bedroom. She suffered from an inferiority complex towards her near-perfect sister, fueled by being helped throughout her life by her. Sumire is actually a reserved and introverted person, in addition to being so suicidally depressed and convinced of her own worthlessness to the point where she resents attempts to cheer her up, although this changes for the better as the protagonist advances her Confidant.
