Phantom Brave: Ivoire Monogatari

A thirteen-year-old girl named Marona resides on Phantom Isle after her parents died while working as Chroma, bounty hunters who handle various tasks, including subduing monsters. Orphaned and burdened by the difficult work of becoming a Chroma herself, Marona faces challenges and is often looked down upon as the "Cursed Girl" due to her rare ability to communicate with and control phantoms. She is aided by Ash, a phantom who was a close friend of her parents and perished with them during a mission. Her parents had asked Ash to protect their daughter, and he fulfills this promise by supporting her as she navigates the harsh realities of her new life.