Hiii, this is going to be a silly question, but what if Navy or Mango gained some weight? It's probably very unlikely since they both have great physiques, but what if it happened? What would their reaction be? Especially Orchid, Neon, and Pey, because I'm sure Pey will make fun of Navy a lot. XD
That's actually an interesting question.
I think weight isn't really a sensitive topic for stickmen. They have needs, like hunger, but it's still unclear whether their weight changes depending on how much they eat or their lifestyle.
As for Mango and Navi, I'd say that in my mind, they're in the same weight category – all because of the height difference. Speaking of them separately:
Mango. Mango is still considered an average stickman, but he's exceptionally tall among them. He looks slim, but he has muscle mass, and he's still a heavyweight. However, he really struggles to gain weight. Not only because of his height, but also his lifestyle (diet and constant physical activity). And even if he does gain weight, again, because of his height, it's barely noticeable on him – he'd have to gain a LOT to see any noticeable changes in his appearance. Neon was really envious of this. Especially during her pregnancy (I'd say she actually hated it then). But if Mango gained weight, for Neon it would be like justice being restored. Navy would be surprised that this 'beanpole' could even gain weight.
Navy. Navy already looks more stocky, and his muscle mass percentage is higher than Mango's. I also think Navy is more prone to weight fluctuations. The reasons: he's not as tall, and he has a bigger appetite – he simply eats more. Moreover, he can gain weight not only from accumulating fat but also from muscle growth. But he's able to stay in shape thanks to physical activity and notices when he starts losing his form. Orchid might have noticed changes in Navi, but for the most part, she didn't care – though maybe she even liked that "softness," for example, when hugging. Mango would probably think that when Navy gains a little weight, he looks cute.
As for Pey, well, she'll always be herself. Attached is a small sketch.

















