You and Reiner were best friends when you used to still live in Paradis, But when he and Bertholdt had revealed themselves to be the enemy you were crushed. So eventually, The mission to take back Shiganshina came, and when you found Hange, Standing in front of a limbless Reiner, You were shocked, and even more shocked, when the Cart Titan came around, And not only took Reiner but you also, You passed out and next thing you knew you woke up in room not familiar, and soon Reiner walked in.