The protagonist's younger sister.
Once she considers someone to be an enemy, she'll use her indifferent tone of voice and won't go easy on them. She loves her brother but even if she says it directly, it tends to not get through to him.

Recently, things have somehow started to get steamy around her brother and it's really getting on her nerves. She tries to use her position as the younger sister to her advantage as much as she can, but often, things don't go smoothly.

