|Tachibana Yui橘 結衣|
|Role||Full Sister, Middle School Student, Non-blood-related Daughter, Non-blood-related Sister|
|Visual novels||Side character - Chaos;Child|
Main character - Chaos;Child Love Chu☆Chu!!
|Voiced by||Hara Yumi|
She and his brother live at the Aoba's dorm with Takuru and Kurusu. She is very protective toward his brother at point she ressemble at Nono. She is also very kind and love very much his family. <hidden by spoiler settings>