Well that’s an interesting thought
I mean why not? Some of the characters could gain (or lose) weight during the timespan of this story, provided that it makes sense in context. But how does one get fat, though? People seem to get in such heated arguments over the statistics of it that I’m really not interested in taking any stances, so that’s kind of tricky
The most plausible thing I could think of so far is that one of the characters could be chubby in their flashbacks, and I do kinda like the idea. That stuff’s a long time ahead though, but we’ll see if I can make it work