Rokka: Braves of the Six Flowers, Vol. 3 (manga) — Ishio Yamagata

The search for the traitor continues. Adlet may have won over Hans, but he doesn't have time to rest on his laurels--now the Saint of Swamps is after his head! Despite her cute looks, Chamo is said to be the most powerful warrior alive. Even if Adlet manages to survive, though, the Braves of the Six Flowers need to find the traitor quickly...before this turns into a bloodbath!