loser!Reiner has no idea how to talk to you, and practices conversations in his head just to forget every line when you smile at him across the dining hall at dinner and just stares back wide-eyed
loser!Reiner has wet dreams about you and wakes up with a curse, heading to the showers to stand under ice-cold water and try to forget the way it felt to hold you that close (you don't have sex in the dream, just kiss but that's more than enough for his subconscious)
loser!Reiner begs Annie to swap with him when you get assigned as her sparring partner, but loses his nerve when practice starts and ends up on his ass immediately, staring up at you in a daze
loser!Reiner can't protest when you apologize and offer to walk him to the infirmary, and might even play up his weakness a little so he can lean on your shoulder on the way
loser!Reiner hasn't heard the last five minutes of your conversation because he's so distracted by the way the sunlight hits your hair, and the way your eyes crinkle when you're enthusiastic about something
loser!Reiner blushes fiercely when the medic tells him his heart is way too fast, asks if he's sick with anything, has to close his eyes and pretend you aren't there so he can breathe normally again
loser!Reiner who starts writing his wedding vows in his head when you kiss him on the cheek before heading back to your room, tell him to take care of himself, look back over your shoulder with a little wave
loser!Reiner who endures relentless teasing from Bertolt and Annie because he gets flustered beyond belief by any mention of you, but secretly likes it because it's an excuse to talk about you more