[[Mahou Shoujo Madoka Magica]] character.

An armored mermaid [[witch (Madoka Magica)|]] introduced in episode 9 and seen again in episode 10. Her minions are [[Holger (Madoka Magica)|]] (the performer) and [[Klarissa (Madoka Magica)|]] (the backup dancer). 

Note: [b][i]Major spoiler warning![/i][/b] 

[spoiler]She is the tragic result of [[Miki Sayaka]] becoming a Witch.

Also becomes a [[stand (jojo)|stand-like]] entity for Sayaka in the [[mahou shoujo madoka magica: hangyaku no monogatari|Rebellion movie]].[/spoiler]
Oktavia_von_Seckendorff オクタヴィア・フォン・ゼッケンドルフ