In these fictions, the theme of 'control' is very common. The yandere character tries to control the male oc's life, his actions, and his relationships. Another prevalent theme is 'redemption'. Sometimes, the yandere realizes the error of her ways and tries to redeem herself in the eyes of the male oc. Also, 'isolation' is a theme. The male oc may find himself isolated because of the yandere's possessiveness, cut off from his friends and allies in the Marvel universe. This can lead to a lot of internal conflict for the male oc as he tries to deal with his situation.
The X-Men are part of the Marvel Comics lineup. They have their own unique place within the Marvel multiverse, with a dedicated fan base and a significant impact on the comic book world.
Definitely not. Captain Marvel is a female superhero in the comics. Her character has gained significant popularity and is recognized for her strength and heroics as a woman.