Character from Overlord by Kugane Maruyama
The strongest entity in Nazarick — surpasses even Ainz in combat, accepts commands only from him, and nobody knows what she actually looks like or what she truly is.
Rubedo is Nazarick's nuclear option. She surpasses Ainz AND Touch Me (fully equipped) in direct combat. She was created through 'unconventional means' that even her creator Tabula Smaragdina considered risky. She only accepts commands from Ainz, cannot be easily controlled, and Ainz considers World Items necessary to counter her if she ever turned hostile. Nigredo despises her, calling her 'Spinel' and viewing her as a ticking time bomb. Albedo adores her. Ainz treats her cautiously. She is Overlord's greatest Chekhov's gun — the strongest weapon in an arsenal that may not be pointing in the right direction.
Undisclosed. Described as 'adorable' by Albedo. Likely mechanical or golem-like. Resides on the 8th Floor Wilderness.
Also known as: The Strongest Entity, Rubedo