Hmm, I disagree with this point since the whole mess with Arthur has to have at least partly something to do with
nobody being a fit host for Chaos. The thing is too big and too powerful to be safely held by a single living being. Best case scenario it eventually fully disperses into the whole of mankind. I know he has his reasons to hate Meliodas, the Sins, the demons' and the AAs' hands in the destruction of his original kingdom, but him being this extent of a lunatic, dismissing the lives of and torturing his own people, has to be under the influence of either Cath(figment of Chaos) or the entirety of Chaos in a too small "container".
Even Percy should be in a safer position, because his human host houses only one or few LSs, anyway, a limited enough in number and power entities that it shouldn't drive him crazy.
Tri Tri I've learned to see as demon-human hybrid physically and demon-goddess(nephilim) soul-wise.

The soul part takes priority so we're down to nephilim.