JeanKasa

JeanKasa is the het ship between Jean Kirstein and Mikasa Ackerman from the Attack on Titan fandom.

Canon
Jean immediately develops a crush on Mikasa upon seeing her for the first time, causing him to blush and stutter. He finds her long black hair in particular to be very beautiful.

After Mikasa's ribs are crushed by a titan, Jean is infuriated and stabs the titan in the eye, freeing Mikasa and saving her life.

In chapter 58, when Jean is disarmed and about to be shot, Mikasa rushes to try and save him. However, it is Armin who ends up saving him.

In chapter 83, Mikasa is shown treating Jean's wounds.

Fanon
Considering recent developments in the manga showing everyone, including Mikasa, to have lost faith in Eren, it is possible she will not love Eren forever. Another thing to consider is that Jean and Mikasa may have gotten closer during the four year time skip. Therefore, it is not out of the question that the two will end up together.

Fandom
AO3