All of the characterizations are really great, and periodically quite funny to relieve a bit of that tension from waiting for Severus to catch on, GAH! ;)

A weird warm, sloshy feeling began in Harry’s stomach. He poked the muscles there for a moment and wondered if he’d eaten too much pudding after dinner.

Was he feeling protective of Malfoy?

*snicker* And I love how Harry, without realizing that it might be a rather cocky line of thought, is thinking about how he has to be along on the Narcissa rescue mission with his Voldie-fighting skills and experiences for it to work out. As if Severus couldn't usually take care of himself. *pats Harry on the head*