尾上 璃沙

Second daughter of the Onoe family. She is Saki's younger sister. She is calmer than Saki. She is a mature and sophisticated girl with a mature way of thinking. She admonishes Saki with cold eyes for her impulsive nature and gives her a stern talking to. In reality, however, she is just a child with superficial knowledge. She has knowledge but no experience when it comes to actually dealing with things. When she actually responds to a situation, she may be a little nervous inside, even though she pretends to be calm. [From official site]