100% fanfiction but if katakuri has to take up big mom's role in protecting tottoland and his family maybe he'll develop more of big mom's "genes" somehow. Kinda like momonosuke and oden tho kata does being way older does make it a bit weird
We know linlin crazy durability has something to do with her mindset somehow. It maybe having ties to haki
When katakuri finally starts to take up linlins role at least in tottoland and decides he doesn't need to cover his face anymore maybe it'll give him some weird mental physical power up
Will it happen? Probably not tho it is kinda weird that linlin didn't give birth to a similar freak of nature like herself imo