Based on official media for "Armored Dragon Legend Villgust", no character named "Ryukia" exists within the OVA or its associated content. The established main characters are Kui, Chris, Fanna, Youta, Murobo, Remi, Ryuquir, and Bostov. While the name "Rukia" appears in unrelated series, it holds no relevance to the characters or narrative of the Villgust universe.