Base: Mermaid Island
Type: Liberator (A-Virus)
Eye Color: Green
Hair Color: Pink
Marianne, who goes by the codename Diamond, is one of Charlotte Scherzen's closest supporters in Adel. She doesn't get a ton of screen time in Valkyrie Drive Mermaid, but she's solidly placed within Charlotte's inner circle.
Her fighting style is pretty unusual—she wields an Extar of unknown origin that transforms into oversized gauntlets during combat. The specifics of why she uses this particular weapon remain unexplained in the series, which has left fans speculating. It's the kind of detail that suggests there's more to her backstory than what made it into the show.
Content compiled by AnimeList.moe from publicly available sources.
