Soran’s most pronounced quirk is easily Hedonist. They’ll drink alcohol, honey, and laudanum by the gallon; gorge on the finest foods at every opportunity; sleep with every person the walks in the room, regardless of gender. There are very few lines Soran will not cross in the pursuit of pleasure. But the character isn’t all mindless self-indulgence (that’s an awesome band, by the way); they’re also Magnanimous and Steadfast, doing their best to help people in need when they can (even going as far as running an orphanage). Still, Soran should not be taken as being flamboyant; when they’re sober, Soran is actually quite Subtle and reserved. Melancholy, even. A casual observer might almost mistake Soran for one of the soulless, at least until they notice the small conga line of devils waiting at their door to ask for the dang thing.
Zero Hunt, on the other hand, is also quite a notably Hedonistic character, but for different reasons. For him, indulgence is less an end in itself and more of an escape from a multitude of bad memories. Consequently, Zero is Melancholy, although you probably wouldn’t be able to tell just looking at him; he hides it well behind a mask of smiles, wit, and quirky charm. He’s also Magnanimous; he likes to play hero at every turn, probably to help himself feel a bit better about all the nasty things he’s done in the past (no Ruthless to speak of at the moment, however; though that quirk does occasionally pop up with Zero, it tends to get buried just as quickly the next time he does something nice). Lastly, Zero has a fairly high Subtle. Not because of his personality, obviously (his personality’s about as "subtle" as a neon pink stovepipe hat), but because of his status as a spy; subterfuge and stealth are simply part-and-parcel to that line of work.