Armin's a bit clueless when it comes to other women - it was hard enough to get him to recognize your feelings for him before you started dating, but now that he's taken, you really wonder if he's ever gonna notice when a girl that isn't you is flirting with him if she doesn't explicitly state that she's in love with him. Take now as an example; Armin is a biology major, and he excels in the subject, so naturally, people are gonna come up to him and ask for help if they're struggling, right? Well, a girl just walked up to Armin and batted her lashes at him, flashing her doe eyes, feigning cluelessness and obliviousness, painfully trying to get close to him one way or the other, only Armin didn't realize she was hitting on him. Eventually, she gave up out of frustration, but it was a very fascinating thing to watch.

"I wonder why so many girls have been coming up to me for help... there are other students in the classroom, haha," Armin sweetly laughs it off, so unaware of everything that just happened. Sometimes you ponder if he acts like that on purpose out of pure shock of his density.