1. What would be your immediate reaction?
First, I'd probably be really confused and think it was a dream, then I'd freak out, then I'd start to cry.
2. Who would it be?
Who else? Sayaka, of course! (Shino-chan, I think since someone else wrote Acchan as their selected dokkiri member, graduated members are allowed.)
3. How would she wake you up?
Sneak into my house, and wake me up in the morning by banging a frying pan or something, then singing Team K song.
4. What would you ask for?
Make me breakfast that same morning.