u are takemichi's sister (u can choose younger or older). In the future u died because of kisaki but since the time he went back in time he hasn't seen u so he was sad inside he couldn't see u again

That time they were at that temple and doing the meeting u were behind a tree sleeping or whatever it is. Mikey noticed u presence and called to u without knowing u so u present yourself and takemichi has tears in his eyes seeing you again