When the Uirusu clan broke off, two of their weapon went with them. Ucello was one of them
Ucello is now a soul weapon of the Uirusu clan. She respect most of the clan member, but connects mostly with Cancer.
Weapon FormSoul Perception: This allows Ucello to use her soul wavelenght to look inside the body and see thier soul. this allows her to see personailty, wavelenght, and strenght.
Soul Resonance: This requires for Cancer and Ucello to use both their wavelenght to access her power. Her ability is allows Cancer to infect his victim, from a long distance
Soul Menace: This allows Ucello to push her Soul wavelenght into her victim, and damage the soul within, causing damage on the outside the body too.