Lokasa

LoKasa is the friendship between Louise and Mikasa Ackerman from the Attack on Titan fandom.

Canon
Mikasa saved Louise from a Titan in 850. This aspired Louise to join the Survey Corps to look for her, to which she did. When Louise joins the Jaegerists, she is imprisoned, and Mikasa goes to visit her. She asked Mikasa if she's staying in the same cell Mikasa was in, to which Mikasa said no, leaving her disappointed. Louise says that they were both saved by Eren, and tries to get Mikasa to free him, although Mikasa coldly tells her to shut up. As she leaves, Louise salutes her.

After escaping, Louise is glad to fight alongside Mikasa again. When the latter leaves her scarf, Louise steals it and decides to wear it herself. When Louise is on her deathbed after getting heavily injured by a Thunder Spear, Mikasa takes her scarf back, claiming that she knew it was going to be with her. As she leaves, Louise says that she followed her by devoting her heart.

Fanon
This ship has a small fandom, due to Louise's actions being seen as "creepy". It only has two tags on AO3. There is a possibility that Mikasa sees herself in Louise, admiring the person who saved her.

Fandom
FANFICTION