Even with no arms, Rin still succeeds in being the best in the school's art club, and getting on with her life as usual. She eats with her feet, she paints with her feet, she does almost everything with her feet.
Emi's best friend and a real cynic, thinking of life in many different ways and she seems like she's always in her own world.
Her voice should be pretty deep or low-pitched, and she should talk like she is ALWAYS bored.