That's called cholera and is a very nasty way to go. Just focus on the fluff.Seriously though, I wish all the possible baddies in this series just permanently have diarrhea and get stuck in the toilet so they don’t get to make any appearances.
i think good chance its either the rival Sarel like they said (prob told him mc's mom was talking mad shit) OR mc's mc's mom asked him to help toughen out our little flufff ball. And the reason he may look so hostile might be cuz MC's mom may not have asked so nicely lol (threaten or blackmail)wonder what made the wind spirit antagonistic