Aramaki really went from "Rahaha go ahead and chill out here Fuji, I'm so lazy that I won't eat unless a pretty lady feeds me"
to basically a psycho willing to put every man, woman, and child on a pike to get Luffy just because he can and because they're outside the influence of the WG spouting off how they deserve to be discriminated in between
Talk about a good first impression for Wano country, maybe it might convince Momo to actually join the WG