Impetuous.

I'll post a (very belated) response to the wonderful essay in a moment, but I did just want to say that if you want some Gwenfic, I've erm, written a couple in which she's quite heavily featured:

http://www.thefreakiestshow.com/treacle-sponge-and-mint-custard.html. And a longer one:

http://www.thefreakiestshow.com/a-good-square-meal---part-110.html

I hope they fit the bill!