Ririka Momobami (Kakegurui)

Ririka Momobami (桃喰 リリカ Momobami Ririka) is a character from Kakegurui. She is the Vice President of the Student Council at Hyakkaou Private Academy and the identical twin sister of Kirari Momobami whose family is aligned with the family of Yumeko Jabami.

It's revealed that when she doesn't have her mask on, Ririka is an incredibly shy and somewhat socially awkward person, who visibly has a lack of self-confidence, which makes her a complete opposite of Kirari. However, despite this blatant disparity, she was able to disguise herself as her twin sister and perfectly copy her behavior during the meeting with their family. Acting as another person is also a kind of mask for her.