I want to know what's the difference between this, the regular Succubus and Arch Imp.
Generally speaking, Devils are most famous for making pacts; in this case though, she just likes making people drown in perverse pleasure. In other words, the devil is just a mid-tier succubus that gets off more on the idea of making others lustful than on her own lust.
Basically, this profile is basically just filler. Hopefully she's leading in to something a bit more interesting; honestly though, the demons are pretty much just the 'meh' category of monsters. Maybe Kenkou Cross doesn't find their lore all that interesting, but keeps getting bugged to make more lolies by various fans?