Phillipe West is a boy whom Oz Vessalius met in Reveil. Phillipe's father, William West successfully lost his family's fortune following Phillipe's Mother's death.
It turns out Phillipe's father is Grim's contractor whom Echo was looking for. Soon after the revelation, his father was murdered by Vincent Nightray.
Phillipe was orphaned because of this, being sent to The House of Fianna, where Phillipe was forced to form an Illegal Contract with Humpty Dumpty. As a result, Phillipe was manipulated into joining Isla Yura's Cult and attending Oz's second Coming of Age Ceremony. It was here that Phillipe and Oz reunited, and Oz managed to save Phillipe by killing Phillipe's Humpty Dumpty and nullifying his Contract. Phillipe's current whereabouts are unknown.
