Ririka is a very quiet and stoic person who often acts as an observer. Despite her silence during the Student Council's meetings, she's mostly in step with Kirari Momobami. However, she does seem to be less cold, as she acted very shocked when Midari Ikishima gouged out her own eye. 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. 