Liam Christopher O'Brien is an American voice actor. He firstly appeared in Castlevania as he voiced Joachim Armster in Castlevania: Lament of Innocence. Later, Liam provided the voice of Isaac from Castlevania: Curse of Darkness, Jonathan Morris in Castlevania: Portrait of Ruin and Castlevania: Harmony of Despair. He also provided the voice of Brachyura in Castlevania: Order of Ecclesia.
- Liam is married with Amy Kincaid since 2002.