The Apprentice of Ouroboros
F21/100Web serial by Magius Swiftscale
Hated by humans. Hunted by monsters. Neska will prove that strength comes from more than defeating foes. Neska Aksen knew early on she was different from other snakes — spending her days giving mice big hugs and reading her witch's tomes in a rustic potion shop. A test ritual unlocked her Interface, revealing that she had a prior life as a human, and the power of Classes and monsters. Her power is unprecedented, but the monsters who fear the Awakened soon learn of her and her witch, forcing her to flee toward Rivilat Academy of the Awakened. With little to go on but steadfast determination and powers from both halves of her soul, Neska must find allies and gather power to survive — and decide what direction her own soul pulls her toward: humanity, or those they're supposed to be fighting against.