JeanSashCon

Springlestein is the poly ship between Jean Kirstein, Sasha Braus and Connie Springer from the Attack on Titan fandom.

Canon
The trio first begins in the second OVA as Jean gets mad at Sasha for stealing his 'titan' kills despite Jean being outside of his zone. Angry, Jean calls Sasha 'Potato Girl' which Sasha dislikes the name very much as it reminded her of the event with her superior and eating the potato for which she got punished and wishes everyone to forget. Sasha tells Jean not to call her names and Connie demanded Jean to apologize to Sasha, Connie afterward tells Jean that he's been acting strange and if it's because he wanted to go see his mother, but Jean gets upset to the point a physical fight nearly breaks out until Reiner stops it.

After the Battle of Shiganshina, they're all seen playing in the ocean with each other and having fun.

Four years later the scouts raid Liberio, after the raid, the Survey Corps are victorious as they defeated Marley and stole one of their titans, a group of soldiers and Floch celebrates this victory and Connie notices that both Jean and Sasha aren't cheering with Floch. Connie pulls the two soldiers close to him and tells them that he's glad they're alive and they're as well very special to him until Jean pulls away telling Connie hugging while having metal gear on his body hurts.

Tragedy hits and Sasha is shot by a small girl, as she lays on the floor dying Connie begs Sasha to wait until they get to Paradis to get proper medical treatment, the rest of the soldiers attack the girl and the accompany boy and tied them up, Jean is shown to be in distressed as Sasha is dying and Floch asks Jean if he should throw the two children out of the airship for shooting Sasha but refuses. Jean brings the two children to Levi and tells him that Sasha might not make it as she's bleeding too much. Connie reports to Levi and the others that Sasha is dead, Jean even goes as far and blames Eren for the death of Sasha. Connie even tells Eren he's hated him for what happened to Sasha chapters later.

Fanon
Despite not having many scenes as a trio it's one of the most popular trio friendships in the Attack on Titan fandom. The majority of the written works on Archive of Our Own are fluff despite the trio suffering from many emotional rollercoasters after the death of Sasha, although the written works might be full of fluff the fan arts after the release of the episode where Sasha dies has gone dark between both Jean and Connie mourning Sasha or remembering the good times with her in the arts amongst many social platforms.

Fandom
FAN FICTION

Variations

 * JeanCon - the ship between Jean Kirchstein and Connie Springer
 * JeanSasha — the ship between Jean Kirchstein and Sasha Braus
 * Springles — the ship between Connie Springer and Sasha Braus