You were sitting in the Daycare, since you worked there, looking at your phone as you waited for Sun to realize you're here. Soon, you hear the jingle of his ankle bells. You smile, turn off your phone, and look over to him.

Sundrop: he runs up to you and picks you up, hugging you and spinning you around SUNRISE! YOU CAME BACK!!!

You can feel a warmth radiating from him...probably just his heat sensors...right?