the.com/wingwoman

means A woman who helps her friend attract a romantic or sexual partner, usually by charming the target's friends, vouching for her friend's virtues, or running interference at a bar or party.

from Borrowed straight from military aviation, where a 'wingman' flies alongside and slightly behind the lead pilot to watch their back and fend off attackers. The slang jumped into civilian life around the mid-to-late 20th century to describe a buddy who runs cover for you in a social or romantic setting, and 'wingwoman' followed as the natural, gender-flipped version once women started doing the same job at bars and parties.