EreAnnie

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

Canon
Eren and Annie had shared a mutual respect ever since their trainee days. As sparring partners, Eren saw past Annie's cold exterior and listened to her ideas as well as reiterated what she said. Their close bond was the reason why Eren initially struggled to accept the reality that Annie was the female titan (which provoked a jealous Mikasa to question whether Eren has "special feelings" for Annie).

After their second hand to hand titan battle, Eren froze at the sight of Annie's crying face and this hesitation was what gave Annie the opportunity to crystallise herself. Eren notably displayed far less anger towards Annie after learning her identity in contrast with Reiner and Bertolt, suggesting he had a soft spot for her.

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. When they speak 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. Due to her resentment towards Marley, there is a high chance that Annie will switch sides and fight for the Eldians when she is broken out of her crystal, which would make her and Eren no longer enemies.

Fandom
AO3