Masumi's fiancée, who is cultured and rich, has a weak health. She was chosen as his partner in marriage due to the convenience it would bring to both families. Although she loves Masumi deeply, he does not reciprocate her feelings. As time passes, she becomes increasingly aware of Masumi's affection for Maya, leading to instability and an almost obsessive love for him.
After finding out Maumis identity as Mayas purple rose fan, she tries to create incidents where she put Maya in the situation where she is at fault.
As of currently, she's recovering at her house from her crazy attempt in commit suicide because Masumi broke their engagement. (Taken from my brain) inksilverblue
After finding out Maumi's identity as Maya's purple rose fan, she tries to create 'incidents' where she put Maya in the situation where she is at fault. Ex. Bump into Maya who's holding juice and making it stain her dress and go all gaga about it and tattled to Masumi. Thus, when Masumi found out the truth that Shiori was plotting against Maya and trying to make him hate her, he broke their engagement.