
(Alex is the one in blue and Arobase is the one in red)
I think my antagonists are Alex and Arobase, and by antagonists, I mean they oppose the protagonists in some way shape or form.
However since they are also part of the love pentagon I also consider them part of the main cast. They may or may not be complete monsters but, to put it politely, they are products of their environment.
Alex is in an arranged marriage with a closeted lesbian. The laws and social expectation put him in the position of an abuser, regardless of actions or motivation. There is also all war crimes.
Arobase's status as an antagonist is a little bit more complicated and technically would constitute some spoiler. Let's just say, he might not be a reliable source of information about his engagement with Alma, and she is not in a position to tell her side of the story.