Mika is cute, it's true. At least he is less prickly and paranoid with au in comparison to canon so there's. That. In their favor. And yeah, Yuu was more the lone wolf type earlier, mostly out of habit in not getting close to people knowing they would likely move again soon enough. But Recolle is different now. Esp with Mika and them having family here.

If nothing else he can be lured out/distracted by offers of food. He's like any other teenage boy in that. Although yeah, from the sounds of it there's going to be a lot of Plot things going down with them closing apps for a bit.