The green-haired girl is the North Star. He is a superhero of American Marvel Comics, co-created by Arnold Drake and Jim Stranko, and made his debut in the 49th X-Men (1968 10). Her real name is Polaris, and she is Wan Ciwang's daughter.

Extended data:

Polaris/Polaris

Actor? Emma Dumont

Can control the magnetic field and metal, and is one of the leaders of underground mutant base; Wan Ciwang's daughter.

Giving is an American drama, another derivative drama of the X-Men series after The Crowd. It is adapted from the X-Men in Marvel comics, associated with the X-Men film series, and set in the timeline where the X-Men have disappeared. The play was co-produced by 20th Century Fox TV and Marvel Comics TV, directed by Bryan Singer and Ryan Wiseman, and starring stephen moyer, Amy Ike, Blair Redford and Jamie Chung.

References:

X-men: a godsend