Alas, Fawkes didn't make it.
Poor guy was warm at least, and had food and plants to hide in.
After Fawkes passed away, I went to Petco to pick up a few plants to add to the tank for Michael and though I told myself I shouldn't, I looked at the bettas. I went back and forth over a red and gold halfmoon, a blue delta tail, and a red veil tail until I decided that the red guy was totally mine--so spry and full of life--and I fell. (I'm such a sucker for a pretty face.) I waited a few days to name him and decided on Milton Dolce; he settled into the QT without an issue, ate and was merry.
Woke up this morning and tested the water since my ammonia alarm was alerting me. It was too high so I did a 50% change at 5:30 this morning and it's back where it's supposed to be.