[ Yeah. Apparently it's that weird app, that everyone seems to be ... using / playing, whatever, Mikasa is not familiar with it. ]

Yeah... I guess he got inspired by his infiltrator person from Rome.

[ He is great in her opinion, though Jean knows that because she told him herself. ]

The blonde is Armin, the fluffy brown hair owner is Eren - there might be two of him running around, who knows how infiltrating works.