Jack nodded, glad for a concrete idea. "Okay, that works. I want to dive right in, it would be really stupid, really, to have a meeting and then not doing anything for the sake of it being 'only our first meeting.' And since no one else had any other ideas, we'll just get started on this, since we'll probably have to work on them some more next lesson. Eventually, I'll get us a Boggart or something- anyone's greatest fear here a dementor- and we could work on that." The more she thought of it, a Boggart would make a good meeting as well.
"So, Patronuses. Simple in theory. Mega difficult in practical use. The incantation is simple enough. Expecto Patronum! The problem is the memory. You must focus on a very happy memory, especially around dementors, and fix on that. Everyone has a different patronus. Watch." She turned and pointed her wand at the center of the room. She thought about chasing down the Loch Ness monster and said, "Expecto Patronum!"
The wolfhound that had replaced the jackal as a bodyguard lept from her wand and galloped towards the center, slowing and loping around in a graceful circle. It stopped and threw its head back before fading from view. Feeling a little exposed, Jack cleared her throat. Those who had ever seen her cast one before would now know it had changed. "For those of you who have never casted a Patronus before, expect silver vapor for the first tries. Okay. Get to it. Ask me if you need help. Try it out!"