Weirdness Magnet: Closer to creepiness magnet; she's attracted more than her fair share of handsome, manipulative, predatory men with magical powers (and Lorcan's the nice one of that crowd, which tells you something), which Havilar lampshades.
Action Girl: Albeit a much more physical one than her sister.
Collector of the Strange: He collects warlocks, apparently a not-uncommon hobby among bored devils and a means of increasing one's prestige in certain infernal circles. Farideh completed his "set".
The Corrupter: Played with. He's not interested in Farideh's soul, and while her conscience annoys him getting rid of it isn't high on his agenda. He mostly wanted to corrupt her just enough to take the pact, since he collects warlocks and as a descendant of Bryseis Kakistos, she's a rare "specimen".
Breakout Villain: Per Word of God, he wasn't even in the series originally- Lesser Evils just had a faceless Netherese expedition as the looming threat. Evans created Rhand mostly to stick some personality onto that group, and wrote him as the embodiment of everything bad about the empire of Netheril. He ended up one of the most prominent villains in the subsequent book.
Collector of the Strange: Collects creepy artwork and magical artifacts, specifically and in The Adversary, he's started collecting Chosen.
Dragon with an Agenda: Implied to be his relationship to his Netherese superiors. He doesn't care about the cause of Shar, he just wants more power for himself.
The Dreaded: Among those familiar with his... proclivities.
Evil Counterpart: Well, Lorcan is already evil, but Rhand shares several traits with him, but is more twisted on every level.
Evil Sorcerer: A cruel Netherese wizard though he's likely not as powerful as he'd like everyone to believe.
Faux Affably Evil: Somehow his veneer of cultured politeness just makes him even more loathsome.
Handsome Lech: Farideh catches on to it pretty early on, though. Mostly played for creepiness especially when its revealed that he doesn't much care if his "paramours" are willing, and what he does do them when he's done with them...
The Heavy: In The Adversary; he's not the only threat, but he gets the most pagetime out of any of the villains and is the most immediate concern for the heroes.
Kick the Dog: Executes an entire courtyard full of innocent people just to make a point to Farideh.
Lack of Empathy: Never shows one iota of genuine concern for anyone but himself.