1.Ā Her official art is one interpretation, and part of the fun of fanart is getting to see new and different ways people see her (this is something the cast has said they actually love about fanart)! People draw Jester in different outfits, with different hairstyles, different shapes of horns, different heights, and different weights.
Itās no different than how some people draw Nott with huge sharp teeth and bulging eyes (Sam has said he LOVES seeingĀ āugly Nottā art) despite that not being in her art, or drawing Yasha as 6ā²5, or drawing Fjord as a skinny twink, or drawing Beau with huge biceps, or drawing Caduceus with longer or shorter or differently-parted hair.
2.Ā ājester is a pretty slender figure that is mostly muscle. because she is super strong.ā
MENG SUPING, world record holder forĀ 188 kilos/414.5 lbs clean & jerk (enough to lift a piano over her head)
HOLLEY MANGOLD, lifted 110Ā kilos/242.5 lbs (snatch) and 145 kilo/319.7 lbs (clean & jerk) at the London 2012 Olympics
SHAIMAA KHALAF, lifted 153 kilos/337.3 lbs (clean & jerk) at the 2017 Weightlifting World Championships in Anaheim
Or how about MARIAM USMAN, with a clean & jerk personal record of 155 kilos/341.7lbs set at the 2014 Commonwealth Games in Glasgow?
Big women can lift more than thinner ones. Thatās a biological fact that athletes, coaches, and scientists allĀ know. ItāsĀ why the sport is divided by weight classesā itās not fair for a 5ā²4 110-pound girl to lift against a 5ā²4 170-pound one, because sheāll get her ass handed to her by the most basic laws of the universe: physics.
Of course, thereās exceptions to every rule, and strength is a subjective thing from sport to sport (these women wouldnāt do well in gymnastics, for example, or surfingā two more sports that also require a great deal of strength). I used weightlifting here becauseĀ ālifting/swinging/moving heavy thingsā is the core purpose of the Strength ability score, whereas many other sports focus more on things dealt with by Dexterity and Constitution in D&D.
So, to citeĀ āsheās strongā as a reason why Jester canāt be fat? My problem with that isnāt that itās mean (although it is a bit of a dick thing to say), itās that itās straight-upĀ incorrect.
TL;DR: Fanart doesnāt have to match up withĀ ācanonāā thatās sort of the pointā and the strongest women in the world are plus-size anyways.