Historia and Reiner didn't seem to be very close, but Reiner seemed to have an interest for her since they first met. He brought up multiple times how he wanted to marry her; the first time was when Reiner, Jean, and Armin escaped from the Female Titan's grasp. They had only one horse since Armin lost his while trying to escape from the Female Titan, and Jean's horse ran away. As they waited for somebody to help them, Historia came with two extra horses. Reiner thought in his mind that she had to be his wife.

Another time was when Reiner saved Connie from a titan by carrying it to the edge of the window sill, and Bertolt and Ymir helped push it down before it could cause any more trouble. Reiner's arm was wounded from the bite, so Historia tried to help him by pouring alcohol into his wound and ripping her skirt to wrap around Reiner's arm. Historia apologized to Reiner for using her dirty skirt, but Reiner assured her that it was fine. In his mind, he thought to himself that he had to marry her.

Reiner was constantly jealous of Christa for her friend Ymir and the other members of the cadet corps, because absolutely everyone liked her, so sweet. He especially didn't like it when she interacted with the scoundrels Eren and Jean. And today was just such a case.

It was dinner and Ymir was sick, so Jean and Marco invited Christa to sit with them. Reiner couldn't look at it calmly. He stood with Bertholdt and looked angrily in their direction. "You want to sit with Christa, right?" - asked Bertholdt.

"So you can see it?" - Reiner was surprised. Bertholdt nodded and Reiner blushed.

"Okay, I'll go see her." - Reiner stood up, took his tray of food and walked over to the table where Christa was sitting.