Naruto: I, the Corpse Vein, the White Eyed Princess

The story begins in a bloody mist.

The orphan Bamboo Cutter, slain by the Kirigakure Anbu, rises from the sea of ​​blood and corpses.

Her mutated gray Byakugan and the combined offensive and defensive Shikigakure (Shikotsu) combine to create the uncanny ability to manipulate her body, setting her on an inhuman path to becoming a physical ninja.

The Shikotsu strengthens her bones, the Byakugan manipulates chakra and her body, the Lightning Release Chakra mode strengthens her body, the Reverse Eight Gates replenishes her life force, she devours the Tailed Beasts to gain an infinite source of power and the Tailed Beast Coat, and possesses the indestructible power of the Monkey Demon... A beautiful girl, as delicate as a doll, becomes an inhuman physical monster.

The ultimate crushing of stats and mechanics, the terrifying contrast between her appearance and combat style, creates a Gokudo Hokage filled with blood and flesh.

(Non-transformation, single-player story, slightly dark, semi-invincible, no system, not a babysitter)