Ariel Müeller is a top-researcher from Umbrella. She married Greg Müeller and adopted his surname. After he leaved Umbrella she divorced him. She asked to her friend from UBCS Hun7er 6amm4 to steal a DNA sample from Greg's most precious creation, Thanatos. She later married with Albert Wesker and had a son, Jake Müeller. Albert Wesker died, and she searched for Hun7er and now is married with him. She is a bioterrorist.