Base: Mermaid Island Type: Liberator (A-Virus) Eye Color: Green Hair Color: Pink Marianne, codenamed Diamond (ダイヤモンド), is a minor character of Valkyrie Drive Mermaid who serves as one of Charlotte Scherzen's most trusted followers in Adel. For some unknown reasons, Marianne uses an unknown Extar as an Arm that becomes giant gauntlets for her to use in battle. (Source: Valkyrie Drive Wiki)