Ougi Ichika

Ren and Rin's younger stepsister. Their mother's (Ren's father's second marriage partner)'s child from another spouse. The kids met when they were in elementary school after their parents remarried.

A reliable person who handles all of the household chores. She is also an excellent honors student. She is shy, and has a hard time talking to the opposite gender. When she's just with Ren she likes to call him "Onii-chan" and fawn on him.