I was recently reading a Worm fanfic (one of the ones I asked about before) and the Youth Guard, a group in-universe who operates to try to prevent exploitation of youths with superpowers, came up in the story in association with Amy Dallon, aka Panacea, one of the major healers in the universe. That suddenly led to me getting vivid memories of another story I read where a sideplot (I think it was far from the main one) had a member of the Youth Guard, female, probably early college age, who was described as wearing too much eye makeup, piercings, and clunky black boots, started interacting with Amy, and the relationship eventually bloomed into something more romantic. Later in the story, the young woman in question was thinking of quitting Youth Guard, because she discovered something (maybe an attempt to exploit one of the kid superheroes?) and was feeding Amy covert information in hopes that she could fix it. I also remember that a rift between them erupted from the young woman in question having engaged in self-harm in the past (maybe even fairly recently) and she did not want Amy to heal her, preferring to wear her scars proudly, while Amy was mildly offended by someone she knew causing injuries to themselves, since Amy is geared to heal.
I probably read it somewhere between the mid 2010s and 2020. Unfortunately, I can't remember many details of the rest of the fanfic, particularly vexing because I don't think Amy was even the main character of the story, but rather a supporting one who got a few focus episodes.