Guren is a black haired teenager with red eyes. As a member of Class Third, he wears a purple mantle before changing to light blue after joining Class First. He uses a bardiche as his weapon and is often using fire magics.
Extra Chapter: "If Only..."Edit
Similar to the "What If..." scenario in Final Fantasy Type-0, the extra chapter is a parallel timeline where there is no war. The Akademeia is holding a school festival where the students from other schools including the Militesi Academy are coming to enjoy the event. All the characters are not dead in this timeline. Guren is caught abandoning his committee duty to buy some snacks from Sayo's shop. Guren and Sayo are later paired up together on the dance floor.
Guren (紅蓮) means "crimson" in Japanese. The katakana form グレン is also the spelling for the Gaelic masculine given name Glen.