Rika often seems wise beyond her years.
Childish Rika has a tendency to speak using "cute" phrases; including sound effects and nonsense words such as "nipaa,"mii," cat sounds and saying "pachi pachi" (clap clap) while clapping her hands.

When revealing her True Personality, Rika's cuteness disappears, and she turns cynical and more mature. She switches pronouns from "boku" to "watashi" and her voice drops to a grown woman's.

Spoken Line(This is done in her mature voice): Kono sekai ni haisha wa iranai.