JeArmin

JeArmin is the slash ship between Jean Kirschtein and Armin Arlert from the Attack on Titan fandom.

Canon
Ever since their very first expedition outside the walls, Jean and Armin have remained very close friends.

Armin tried to protect Jean after he was knocked unconscious during the Scouts' operation to retrieve Eren.

When Jean was about to be killed by one of Kenny's subordinates, Armin shot her to save his life.

When Armin and Jean were disguised as Historia and Eren, Jean struggled to watch Armin crying while getting felt up by a perverted man. Jean later fixed this man's gag so that Armin didn't have to.

Armin told Jean the real death of his parents, explaining that they were killed by Military Police.

Jean places great faith in Armin and turned to him for advice when their situation became dire during the Battle of Shiganshina.

When Bertolt burned Armin, Jean cried at Armin's supposed death and was relieved and emotional at his revival.