Keiren

Keiren, or Kei for short, is the captain guard of Edinmire and the son of Flora's old master. According to Flora, he often stood up for her for what she was. However, as he grew older, he slowly changed and, by the end, was chasing Flora when she ran way. After some years, Flora has not fully forgiven him and still holds him with distrust and anger. With the few exchanges, it's seen that he doesn't have high regard for Trace as he doesn't know his true identity.