Y/N and Reiner have known each other since childhood. Have been best friends since forever both inheritors of the titans, and both part of the warrior program. y/n got selected to go alongside Reiner and bertholdt to go inside the walls for Marley. Y/N tries to hide her feelings for Reiner that she’s always had not knowing that he also loves her back but has been to afraid to admit it to her. He’s always worried about Y/N, cared for her and put her above everyone else but shes too oblivious