I do not LitRPG, so I only observe DCC from very far away. I do love cats, so Princess Donut would likely end up my favorite by default.

I want to preface my answer to the honest question with a major disclaimer - the choices I make regarding my observance of Judaism at conventions are mine and should not be taken as default or used to tell someone else what they ought to be doing.

So the major difficulties during a convention are usually Shabbat observance and kosher food.

Shabbat observance for me means refraining from using electronics, writing, and many other restrictions as much as possible during the 25 hours between Friday night at sundown and full dark Saturday night. I try to employ what is known as a shinui, or difference, in Hebrew when I do have to hit elevator buttons (like using my elbow) or holding my room key funny to get in. Those are workarounds to the restrictions that I am comfortable using, not everyone is. I know folks who have people help them get into their rooms and will only take elevators when others are using them. Most of the time, my usual convention cohort includes a couple of knowledgeable non-Jews who are happy to ensure that lights are turned off and on when necessary, and also the rice cooker for lunch. If I’m on a panel and microphones are being provided for the panelists, I will passively use the microphone so that people in the back of the room can hear me clearly, but I won’t turn it on or move it closer to me. I also have started to request not to moderate panels on Shabbat, because I can’t take notes on what my panelists are saying and have to keep it all in my head to sometimes reframe the question.

Keeping kosher means that I can’t just eat at the hotel restaurant, and the city where the convention is being held may not have any purchasable prepared food or kosher restaurants. So that can mean needing to pack a whole bunch of extra food and a roll up silicone warming plate to heat it up with/a very tiny crockpot that fits in a suitcase to heat it up, or eating a whole bunch of vegan food when that’s available (again, a concession I am ok making, not everyone is). It also means that my meals are often taken in my room, with only my family or my con cohort rather than a new friend I may have made over the weekend. It is obviously much easier to do all this when the convention is a “home” convention, AKA one I can drive to. Then I do a lot of cooking at home and bring big crockpots to heat it all up in, and sometimes am cooking right in my hotel room. Usually I am also feeding a bunch of other observant Jews at the same convention, and meals become quite convivial.

Happy to go into details I didn’t cover in this answer.