Echo is Vincent's personal servant. She is somehow emotionless, like a puppet and she treats Vincent's words as law. Oz calls her "Echo-chan". Echo fights with blades that come out of her long sleeves. It may seem that Vincent treasures her, but he actually does not care that much. In Chapter 23, he goes as far as to poison her to prove that the antidote for the poison that he poisoned Sharon with works. Echo is shown to have her own mind when she saves the bottle of antidote that Vincent almost drops off the veranda, because she remembered what Oz said the first time they meet. In Chapter 33 she admits that she finds Vincent annoying. She seems to have developed feelings for Oz after both of them went to the festival together and Oz shows her what it is like to have fun. He also gives her a hair ornament which he was supposed to give to the girl he likes, although he didn't know that. She is known to have another personality called Noise, who is actually Zwei. Zwei loves Vincent deeply and is the original personality inside Echo's body. Zwei controls a chain called Doldee that can control other people or immobilize them using strings. Zwei used her chain to immobilize Gilbert, and also used it within Echo to capture Sharon.