I had read somewhere that normally female oni appear as beautiful women but can quickly turn ferocious with jealous rage and whatnot.
That's just women
Don't mock us, child!Yuugi is troubled because oni and humans, our challengers, went on different paths.She's wondering whether trust and strength can coexist or not.We oni take pride in our strength.So to speak, we are beings who value challenges, one can trust that we will keep up with the challenge.