Attack on Titan Preferences

Jealousy

Jean: Will Act normal until the person pulls a fast one then he gets defensive like the stalwart stallion he his.

Eren: This ball of titanboi rage will straight up confront them sometimes embarrassing you which he'll make up later with by bringing ice cream.

Levi: He will get unnaturally quiet and glare at the person and can get really violent to the person if they throw some flirts.

Reiner: He is pretty out going so he is alright with someone liking you as long as they don't make a move on you. Then there's a problem.

Bertolt:
The gentle giant will politely take you away from them and you have to talk to him about how you'll always be with him.

Annie:
Glares menacingly at them and destroys their self esteem with her words and if needed, her fists.

Mikasa:
Pretty much on the same boat with Annie but is slightly more sympathetic with her choice of vocabulary.

Sasha: wraps an arms around her waist and introduces her self as your girlfriend making the situation awkward.

Hanji:
Will use her words to out wit her opponent and will walk you out if there politely.