Phantom Marionettes have the ability to merge with the soul inside their soul trinket, turning into a ghostly version of themselves. In this form, they take on a mix of their own traits and the traits of the soul they’ve merged with. This power was originally given to help protect them when they were collecting souls, which was a dangerous job back then. Nowadays, they don’t need the phantom form as much, but it’s still an interesting and strange ability that they can use in combat or for self-defense when needed.