[Trunks seems a bit confused but also in minor shock, that mirror image was his other self. The one from the alternate future. Why was he smiling at him? Was he happy to see him? He doesn't get it. But he does know why he's frowning at the other. It was the anger and sadness he still held inside his heart over his other self never returning to see him or his parents. He then sighs a little and frowns at Rei.]

That guy you saw, he wasn't just a reflection. He's me from another time and... There's a lot of feelings I have about him.