"Of course, something as insignificant as tobacco would have no effect on my wizard physiology." Alice placed her fists on her hips, laughing haughtily. Accepting the cigarette, she placed the smelly item between her lips, and with a snap of her fingers, produced a small flame to light it.

Immediately, she began to cough violently, doubling over as she dropped the cigarette.
"As you can s-" she cut off to dry heave. "...See, no effect."

"No doubt you are impressed by my constitutional prowess." she turned to face an easily impressed dark haired girl, still coughing into her hand, albeit looking much more composed.
"Prowess comes naturally. It's why the SODE so readily hired me on, you know."