That is Loba, the new legend coming to ‘Apex Legends’ when the fifth season starts on May, 12th. Apparently she was spotted at the end of Revenant’s story after his introduction to the game. Now she’s a master thief out for revenge.
More info to be found here: https://www.ea.com/games/apex-legends/season-5
‘Apex Legends’ is free to play on Xbox One, PC and PS4.