(Capcom's primary storyline)
Diana (code: D-006) was a girl born through Mold experimentation by The Connections. She was one of eight children genetically-engineered as embryos to incorporate Mold, becoming D-Type bioweapons. Daniella was killed by Dolores prior to her suicide.
Diana's existence is confirmed in a document that is on the retail disc though not appearing in the game. Dolores' identity as D-005 may suggest the murder-suicide was mental or Mold-related, as she appears in-game as a baby.