Mei Aihara is the second protoganist of the yuri manga Citrus. She is intelligent and serious student council president and the younger stepsister of Yuzu Aihara.
- She can get too close to Yuzu, like when she hugged her to check her pucket, and when she gave her a kiss in bed to make Yuzu feel the sensation of kissing as she took her first kiss, and when she licked the cream on Yuzu's face indirectly.
- She is understanding of Yuzu and can read her thoughts, like when she discovered her intention to take her back from her grandfather's house, and like when Yuzu was gazing at her body at bath, she knew exactly what she was thinking and toke the lead to touch her.
- When her grandfather expelled Yuzu from the school, she talked to him and convinced him to return her.
- She kissed Yuzu goodnight . their new couples-bed.
- She gets turned on by Yuzu's breath.