The Flash season 8, episode 9, "Phantoms" introduced the character of Tinya (Mika Abdalla) as the Coast City Phantom
The Arrowverse Tinya is based upon the comic book character of Tinya Wazoo, who was a member of the Legion of Super-Heroes that fought crime using the codenames Phantom Girl
Tinya's ability to enter and exit the Phantom Zone saved her and her friends in the Legion of Super-Heroes on more than one occasion.