FOX (Frontial Operation X) is one of the female characters in CrossFire, available in most CF versions. In most versions, this character is available in the Black Market, while Chinese version put her in the Item Shop.
- In Russia, FOX has their own Russian voice, similar to STAR in CF Korea.
- Even though the descriptions in CF North America state that Fox "stripped armor for speed", they don't actually run any faster than other characters.
- Like other popular characters in CF China, players cannot buy FOX permanently, they can only be rented for a period of time.
- FOX's GR HUD incorrectly shows hand models of the S.T.A.R, with black shirt and yellow stripe, although the gloves are correct. This happens because FOX's HUD is just a recolored version of S.T.A.R.'s HUD. Fixed in most CF versions, but still exists in CF Vietnam & CF EU.
- CF PH and CF NA released the character during the popularity of the song "What Does the Fox Say?"