One such plot thread in season 2 involves Detective Maggie Sawyer and Kara’s sister Alex Danvers – where Alex falls for the lady officer, realizing that she is a lesbian and coming out to her family and friends.
In contrast to the series’ sci-fi/superhero aspects, Supergirl’s “coming out” storyline has been praised for playing out in nuanced and realistic fashion.
Alex has never been in this kind of relationship before and she’s going to make some rookie mistakes that they’ll have to get past.
Maggie has been presented as being the perfect guide for Alex’s journey this season, but Alex is going to learn that Maggie isn’t perfect, which is going to lead to some difficult situations coming down the road.”