“After the battle with the Empire, the Razelian Knights were decimated, leaving only the youngest soldiers. Eugen went through hardship after hardship to protect us, and now he can't even hold a sword any more after all the wounds he's suffered. The young knights all know his pain... That's why they do their best to repay him.”
—Runan talking about Eugen
Although most of the Razelian knights died fighting against the Zoa Empire, Eugen suffered deep wounds in his attempts to protect the youngest ones who survived. This caused him to never be able to wield a sword again. He also began training the young knights, including Kreiss and Arkis, to become fine knights.
Eugen is a loyal and honorable man who dislikes treachery, as shown by his treatment of Arkis after his betrayal of Runan in defense of Rina. He seems to be more trusting than Runan, as demonstrated when he welcomes Zeek into the army without thinking that he is suspicious. He states that Enteh is the most beautiful woman that he has ever seen. He is particularly harsh towards Narsus and wishes to kill him for abandoning Runan's army with half of its gold.