I couldn't say for certain but a good amount of characters have huge potential...
Reimu could make a great NEET, just being lazy and eating when she doesn't work, Kanako, well, mountain goddess.. need I say more..
Tewi would totally make reisen get fat and don't even realize she likes seeing her like this.
And idk what else... maybe Yuugi since oni hunger but strong fat suits her better.
In the end all Touhous should be fat methinks, let the entirety of Gensokyo waddle