Skyler Samuels has been cast in an unnamed key recurring role in Fox's The Gifted, according to Deadline. Samuels' character is described as "a refugee mutant with telepathic abilities and a mysterious past."
Of all the prominent telepaths in Marvel Comics, Emma Frost is the first character that comes to mind as a contender for Samuels' hidden role. While Frost appeared previously the X-Men movies (and the 1996 Generation X made-for-TV film), the continuity between The Gifted and the movies is ambigious at best - and one character (Blink) has already been been used with a new actor in the role.
Samuels is best-known for playing Grace in Scream Queens, and also appeared in American Horror: Freak Show, The Duff, and The Nine Lives of Chloe King.
The Gifted has six more episodes in its season.