EreAnnie

Ereannie is the het ship between Eren Jaeger and Annie Leonhart from the Attack on Titan fandom.

Canon
Eren and Annie have shared a mutual respect ever since their trainee days. As sparring partners, Eren sees past Annie's cold exterior and listens to her ideas as well as reiterates what she says. Their close bond is the reason why Eren initially struggles to accept the reality that Annie is the female titan (which provokes a jealous Mikasa to question whether Eren has "special feelings" for Annie). After their destructive titan brawl, Eren freezes at the sight of Annie's crying face and this hesitation is what gives Annie the opportunity to crystallise herself. Eren notably displays far less anger towards Annie after learning her identity in contrast with Reiner and Bertolt, suggesting a soft spot.

Fanon
Post time-skip, Eren and Annie are arguably just as villainous as each other. Both have killed hundreds of innocent people - both directly and indirectly. However, both did so against their will and with the intention of helping humanity. If they meet again it is likely they will have a deeper understanding of each other due to their shared experience, and this may lead to something more over time. Some speculate that Eren will be the one to convince Annie to switch sides and fight for the Eldians.

Fandom
AO3