A Marvel Comics superheroine.
Crystal Amaquelin Maximoff was a member of the erstwhile extraterrestrial superhero group called The Inhumans, and possesses control over the elements. As such, she soon came into contact with The Fantastic Four, specifically Johnny Storm, The Human Torch. They entered into a romantic relationship, even against the wishes of the leader of the Inhumans, Black Bolt.
Because of this rift Crystal spent a lot of time with Johnny, even becoming a full fledged member of the FF for an extended period of time during the pregnancy of Sue Storm.
However, all of the Inhumans developed severe allergic reactions to the toxins in Earth's atmosphere, and were forced to emigrate to the Moon, effectively ending her relationship with Johnny (whose cheatin' heart would have done her wrong sooner or later anyway). There, she met and later married the mutant known as Quicksilver.
All characters contained herein were created by Stan Lee, Jack Kirby, and Marvel Comics.