Delilah, usually just referred to as DM, is a player in Grand Line 3.5, which tells the story of One Piece. She plays one character within that universe.
DM used to dungeon master for Luke, Cory, and the Game Master, but found herself too busy to do so upon becoming a T.A. After becoming more accustomed to being a T.A., she was able to set aside some time to rejoin the group as a player. She also happens to be Rika's T.A.