Kannei Kouha

In the anime, she is a loyal bodyguard and warrior to the Son family. While normally calm, she becomes hotheaded when someone questions her loyalty to the Son's.

In the visual novel, she is a loyal ally of Sonken's who almost never leaves her side. She feels thankful for Kazuto as he has made Sonken more happy and lighthearted compared to when Sonken was still a ruler.

(Source: Wikipedia)