Slaotra Reltanu
Slaotra Reltanu, the "Defector Prince," is the heir apparent to the D'umku Court and a rare beacon of hope in the tumultuous realm of Hell. Obsessed with the Surface Realm and enchanted by mortal culture, he wields his acid-aligned magic and personalized rapier, Organi Fioriti, with grace and precision, while his curiosity drives him to bridge the realms of Heaven, Surface, and Hell.
Acid Attack: While it is inherited through his genes, Slaotra is known to have Acid-based magic as a method of fighting.
Bodyguard Crush: Magal is the first object of Slaotra's affections. It turns out that Magal is his Knight, considering he's the Prince of the D'umku Court.
Foreign Culture Fetish: The fact that his rapier is named Organi Fioriti (Flowering Organs in Italian) should be proof enough. But he takes it to the next level by reading about France, which is learned through books owned by the D'umku Court.
Honey Trap: Shortly after he's first met, Slaotra shows two Zha'ktuul grunts he slaughtered. How did he do this? His own sex appeal plus acid magic.
In Touch with His Feminine Side: Slaotra is rather androgynous in terms of body shape, plus he is a rather skilled cook. He also doesn't hide his romantic side, willingly.
Like Parent, Like Spouse: Slaotra ends up marrying the son of his father-in-law; and it turns out that both Magal and Xal'nar are The Berserker.
Otherworldly and Sexually Ambiguous: Slaotra Reltanu is rather thin and androgynous, but he does have some muscle definition. Otherwise, he's pretty much the ideal example of demonic androgyny.
Polyamory: If it wasn't already obvious, this demon is in a 30-person polycule (with him included, it's a 31-person polycule) by the end of the storyline.
Rapunzel Hair: Slaotra is a male case of this trope, as his hair is knee-length.
Royal Rapier: As a Court prince, he uses a rapier as his main form of weapon-based combat.
Royals Who Actually Do Something: Despite beng a Prince, Slaotra is a well-trained combatant. Of course, that training is all self taught, making him a Self-Made Man.
Tangled Family Tree: A very obvious case, considering 10 out of the 30 members of the polycule (the actual number of members is 31, including himself) he's a part of are part of The Clan.
You Gotta Have Green Hair: Slaotra's hair color is a dark green, and it is very natural for the setting.