Prompt #13 was "In A Halloween Costume" and because we don't really do Halloween in the Netherlands, I thought I'd have a bit of fun with it.
You'll be surprised to hear that in X!Gloop's culture, this is not considered drag. Cultures change, and in the far-flung future in which X!Gloop lived out his 328th life, Halloween as a celebration of spookiness derived from the traditional feast of All Hallow's Eve was long forgotten. The day lived on, but it had become all about the sexy costumes, for men, women and others alike. Esokolupa, as this reincarnation was called, was pretty into the holiday and his Sexy Devil was particularly successful that one year.

Prompt #12: When They're Upset. X!Gloop is usually stoic. But on the second page of his first adventure, when his friend John Longcoat gets taken hostage by a Grismoon rider, he did lose it for a moment.
In the comic, he gets angry and sweary. I was very proud of the way I did the foreshortening at the time, but it doesn't look at all good to me now. This more polished reinterpretation of the scene is marginally better where the birds-eye perspective is concerned. But only marginally. I'll have to work on this a lot.

Prompt #11: In his undies.
In 2004, Xavier Esculapius went to New York with barely any idea of what he was doing or why he was there. He got a job from Hasvar Andetoyen of Andetoyen Industries, which took him to the jungles of Southern Siberia. In exactly none of the surviving visual sources documenting this particular life of X!Gloop is he shown in his underwear, but if he had been, this is what it would have looked like.
Boxer briefs by Dwarps Industries, USD 10.

Prompt #10 was "As a Magical Girl or Boy". X!Gloop has had many lives, only a few of which have been documented. In at least one of these lives, he was magical.

(I had no idea what I was doing with this, and then I ran out of time. But it got done.)

For Prompt #9, Dancing, here's Skolp and Ahasper dancing on the bridge of Ahasper's space vessel. Ahasper's from a clothes-wearing culture and is uncomfortable being fully nude in the presence of someone she's not intimate with, so she gets a little skirt/shawl to wear even after several weeks at close quarters with a guy who is always nude.

The spaceship bridge is based on Tonto, the famous giant synthesizer. If I had a whole day, I'd make it a lot more detailed.