Nautilus

Nautilus (ノーチラス, Nōchirasu) is a male Demon, haling from the Demon Realm. For his prowess as a mortal, Mustard saw potential in him becoming far stronger, eventually dubbing Nautilus the Eleventh Universe's. However, despite holding the position, he was still far weaker than Mustard himself, something that is not considered normal between God of Destruction and Supreme Kai relations. Because of his ego and overall unwillingness to better himself, Vodka rarely acted as a teacher to him, which resulted him in being one of the weakest Gods of Destruction within the history of the. His position was eventually usurped from him by Lion, who in turn became the God of Destruction of Universe 11, giving Nautilus the ultimatum of either perishing then and there, or becoming the universe's Arbiter of the Dead (死者の仲裁人, Shisha no Chūsainin). After this exchange, Nautilus was sentenced to the Other World to decide where the dead go.

Trivia

 * Nautilus uses the costume design of Karna from the video game Fate/Grand Order.
 * Nautilus' name comes from the, a type of seafood, fitting with the Demon's seafood naming scheme.
 * Nautilus' birthday is set on Halloween, fitting with his race as a Demon.