We don't talk enough about how weird it must have been for mikayu to reunite after 4 years and how for both of them the version of the other they got was almost opposite from how they remembered eachother.
Yuichiro used to be this angry kid who tried to keep distance between himself and everybody else to protect himself. It was always obvious it was an act but like mika says later, he was so fragile, so scared of being betrayed he'd rather act aloof and grumpy than admit that he cares. To the point that he is only able to say that the hyakuya orphans are his family as mika is dying.
Meanwhile, in the past mika was constantly smiling. He was always reaching out and looking out for the hyakuya orphans. He took it on himself to shoulder the burdens of their circumstances so that the rest of the kids could feel somewhat safe and happy. So he was constantly telling them jokes, smiling and creating a light hearted atmosphere. Of course this is also an act which he admits to as well, Funnily enough this facade drops at the same time as yu's when the other orphans die he becomes openly cold and calculated and he sobs as he dies.
In yu's head mika becomes this symbol, this ideal of family and kindness and what it means to be loved. so with all of that it must have been weird to see vampire mika 4 years later, someone who can't trust anyone, is hostile and cold and distant. So of course yu tries so hard to get mika to like his new family, in his mind if there is one person who would understand its mika! And it makes sense hes frustrated when, for example, mika immidietly despises guren, in his pov this person who taught him about the unconditional love of family is turning back on that because of fear.
And on mika's side, it must have been such a whiplash to see the person who you remeber as being closed off to the point you had to force your way into their side, someone who refused to show his affection and care without anger be so open and friendly. Like just seeing how much yuichiro smiles now must have put him through a loop. Like, no shit mika eventually comes to the conclusion yu doesn't really need him anymore! He looks like he's doing great (minus the expiremantation of course) - which is really funny because yu's smile in the present is as much an act as mika's was!
After the 4 year time skip mikayu took on the other's attitude/coping mechanism to the point they became hard to recognize as the people they were. And I think that's beautiful ❤️ they are truly eachother's perfect mirror image.
