Lu's elder brother, who befriends Kio Asuno and invites him to his house, after saving him from a pick-pocket. As he becomes aware of his sister's feelings for Kio, he asks him not to meet her anymore, fearing it would only make things more difficult for her. Eventually, he becomes grateful to him for providing medicine for Lu and making her final days as enjoyable as possible. Soon afterwards, he joins the Vagan military, after discovering that Kio is a Gundam pilot under the Earth Forces and participates in the battle of La Gramis.
- Deen's voice actor, Tetsuya Kakihara previously voiced Youth Glynnhorn and co-star with Lu Anon's voice actor, Kanae Itō as Plym Machina in Battle Spirits Brave, another anime series created by Sunrise.