10 Comic Characters You Won't Believe Joined The Fantastic Four
8. Crystal
The youngest member of the Inhuman royal family, Crystal has joined the Fantastic Four twice since her creation in 1965. She was the first outsider to join the team (Fantastic Four #81), as she replaced Sue Storm during Sue's pregnancy with Franklin Richards.
During Crystal's time with the team, she helped fight some of the FF's greatest villains, from the Wizard, to Doctor Doom, and even her brother-in-law Maximus the Mad. Eventually, she had to return to the Inhuman city of Attilan to help save Black Bolt's life, before again once more returning to fill Sue Storm's position on the Fantastic Four.
With her power over air, earth, water and fire, Crystal is a powerful edition to any team she joins. Regardless of whenever she is on the planet, she has full control over every facet of it.