EDIT: I made Dawn a little taller, since her original height no longer worked with the idea. I was considering making Dawn another time traveler, but no. She's just ridiculously short. PS. Dawn and Rook are still together.
Okay, now this is just a gigantic spoiler. The title says it all, Dawn's look says it all. I'm not saying anything except that by this time, Dawn and Magister Rook are no longer "together-together", in fact their relationship is complicated at best.