“I don't need you to tell me when to retreat. If we lose the element of surprise, we'll fall back.”
—Sealen
Sealen is the boss of Chapter 15 in Hector mode of Fire Emblem: Rekka no Ken. He is a member of Eubans' mercenary band and was sent to take back Laus castle. He seems uneasy with Heath and thinks he is not a true mercenary. We do not know if he is dead or alive if he survives the chapter.
Also like many other bosses in the game, his portrait is reused in a different color pallete, in this case with Oleg.