Oyster is a male Fantasma Bianca. He is a member of the I Soldati Di Dio. His Fantasma Bianca title is Imperatore Divino (Italian for Divine Emperor).
His Purifichi I Dei is La Ghiottoneria Di Dio (Italian for "God's Gluttony"). In its sealed state, it takes the form of a bow that fires cero, which is unusual for a Fantasma Bianca, seeing as they have Crudeltà, not Cero.
- Apòstolo: To release it, Oyster jumps into the air and uses Anno Luce to speed towards the ground. His Apòstolo is called Caverna (Italian for Cavern). Oyster and whoever else in his area fall down several hundred feet into the ground, finally landing in an underground cave. The hole of where they fell closes up after this, giving both a limited air supply. Actually, this only affects his enemy, Fantasma Bianca don't need to breathe.
- Piena Fusione: His Piena Fusione is Un'ascia (One Axe in Italian). To release it, Oyster condenses the entire Caverna cave into an axe made of stone. The hole where they originally fell opens up, and without having to even move, they shoot upwards. The hole closes after them.