Enfys Nest is a fictional female in the Star Wars series. The character was portrayed on screen by Unknown. Enfys Nest is believed to be the main antagonist in Solo - A Star Wars Story but not much has been revealed about the character. What is speculated is that the character is the person wearing the mask on the desert planet in the trailer. It is believed that the character is female based on what was spotted in a French magazine and then translated. Screenrant.
The description of the character is :-
Enfys Nest, an extremely dangerous marauder, has quickly forged an infamous reputation for herself and her gang of pirates - the Cloud Riders.
The female could be Qi'ra who is the lead female character. Tobias Beckett, a gang leader who recruits Han Solo warns Han Solo that he'll be betrayed but doesn't elucidate so Qi'ra is in the firing line. Although, you need to also consider Lando Calrissian as he's known to betray Han on Bespin. There aren't many female characters in Star Wars and only Captain Phasma being an antagonist so this will make it the second female antagonist. In addition to Qi'ra, we should also consider Val