Iltutmish is a supporting character from the anime Taboo Tattoo, serving as a memorable antagonist affiliated with the organization known as Brahman. She is a young girl of teenage appearance, characterized by her long blonde hair and red eyes. Often simply called Il, she has also earned the nickname Schrodinger's Cat among her allies.

Her background reveals a harsh and lonely past. Before becoming a soldier, she was a stray child living on the streets, an experience that left her with a feral and survivalist edge. Her life changed upon a chance encounter with Princess Aryabahta, the ruler of the Kingdom of Celistan. When the princess attempted to humiliate her, Iltutmish demonstrated her fierce combat capabilities, which led Aryabahta to compare her to a stray cat and subsequently recruit her into her service. This event forged an unbreakable, if complicated, loyalty to the princess.

In terms of personality, Iltutmish embodies a blend of deadly professionalism and a childlike, almost feral demeanor. She is completely devoted to her master, Aryabahta, and carries out her orders without hesitation or moral conflict, showing a ruthless side in battle. Her nickname, Schrodinger's Cat, suits her unpredictable nature. She can be cold and threatening, yet she also displays moments of surprising vulnerability and a desire for connection. This is most clearly demonstrated when she finds an abandoned, sickly kitten. Despite threatening to kill it, she nurses it back to health, seeing her own reflection in the creature's struggle to survive. She shares an apartment and a working relationship with her colleague R.R. Lurker, a sadistic whip-wielder who acts as something of a caretaker for her, and the two share a pet capybara named Mickey.

Iltutmish serves as a recurring field agent and enforcer for Brahman. Her primary role in the story is to act as a direct and powerful threat to the protagonists, including the main character Seigi. One of her most significant early actions involves using her unique abilities to possess Seigi's friend, Toko Ichinose, forcing him into a conflict where he must fight a loved one. As the conflict escalates, she becomes a near-unstoppable force on the battlefield. During a major confrontation, she is seen single-handedly tearing through military forces, having transformed into a giant, monstrous creature.

Regarding her development, Iltutmish remains a steadfast agent of the princess throughout the series, with her loyalty rarely wavering. Her primary growth is not a change in alignment but a subtle reinforcement of her humanity. Her relationship with the stray kitten she adopts serves as a mirror to her own history as a stray taken in by Aryabahta, reinforcing why she remains so fiercely loyal to the princess who gave her a place and a purpose. Her evolution is less about questioning her path and more about solidifying her identity as a dangerous but tragically loyal soldier.

Iltutmish possesses a Power Crest that grants her formidable and unusual abilities. Her primary power allows her to phase through solid matter and possess the bodies of others, provided someone acknowledges her existence. She uses this ability to devastating effect in combat, making her incredibly difficult to harm directly. In addition to this, she wields a massive, cruelly shaped sword that is taller than she is, turning her small stature into a deceptive advantage. Furthermore, with an augmentation of her power from Princess Aryabahta, she is capable of transforming from her small form into a gigantic, rampaging black smilodon, a prehistoric saber-toothed cat, which vastly increases her destructive power.