Kakouen Myousai

In the anime, she is the younger twin sister of Ton. Just like her sister, she is also loyal to her cousin Sousou and is one of her commanders. Unlike her sister, she is more calm and an ingenuous person.

In the visual novel, she is the younger sister of the Kakou sisters and also Sousou's cousin and a commander of the Gi kingdom. Unlike her sister, she is calm and very intelligent. In the first game she shows no signs of resent for Kazuto after being captured and treats him normally. In the sequel, Shin Koihime Musou, she has a normal friendly relationship towards Kazuto, and often asks him to bear with her older sister's odd behavior.

(Source: Wikipedia)