* AwesomeEgo: Robin.
* CompleteMonster: The series has its share of reprehensible villains
** Darkling, the VillainProtagonist of ''Nightlife'', is, in Cal's words, "a nightmare for hire and the LastOfHisKind." A mercenary banshee who is in it for [[OnlyInItForTheMoney money]] and [[ForTheEvulz kicks]] in equal measure, Darkling's a casual killer who sees murder as a way to relieve boredom. Signing on with the [[AlwaysChaoticEvil Auphe's]] plan to travel back in time and [[KillAllHumans exterminate humanity]] in its infancy, Darkling [[GrandTheftMe bodyjacks]] protagonist Caliban "Cal" Leandros, and takes him on a road trip to Hell. He tries to kill Cal's brother Niko's girlfriend, Promise, hires a pair of werewolves to kill Cal's girlfriend Georgina, then kills the surviving werewolf when they fail. He feeds a captured mugger to Boggle in order to bribe him into attacking Niko, then tries to gun Niko down himself, burns down the shop of a fence who tried to rip him off, and is captured while trying to trigger the apocalypse. Unlike the Auphe, who are doing it to ensure the survival of their species, Darkling is in it for the thrill and the cash alone, and he remains a greedy, swaggering egomaniac to the end.
** Hobgoblin, better known by all and sundry as Hob, is the oldest living puck, and may be the [[MonsterProgenitor first of his kind]]. He's also a sociopathic conman and killer who gloats openly about being "the reason there's no honour among thieves." [[TheManBehindTheMan Orchestrating the events]] of ''Moonshine'' from behind the scenes, Hob arranges for the kidnapping of Georgina, and the werewolf cub, Slay, in order to ensure that Niko, Cal, and Slay's father Flay, will go along with his plans, which involve using a gypsy crown to mentally enslave everyone he comes across. When his agent, Caleb, [[YouHaveOutlivedYourUsefulness outlives his utility]] Hob pins him to the floor with Spanish poniards, cuts out his heart and rams it between his teeth. He then kidnaps Niko and plans to drain him of all his blood in order to activate the crown, while using Georgina's psychic powers as source of energy. When Cal interferes, Hob makes a very deliberate attempt at cutting him to pieces, bragging that: "I can do this as long as it takes. Piece by piece, strip by strip, I'll have you down to dripping bones, and when I'm done draining your gifted girl, I'll beat her to death with what's left of you."
** Sawney Beane, the [[BigBad main antagonist]] of ''Madhouse'', is a Redcap SerialKiller resurrected after several hundred years dead. He quickly sets out on a killing spree, leaving his underground lair littered with the bodies of his victims. He assembles an army of [[OurZombiesAreDifferent revenants]] and impresses his own personality on them, leaving them mirror images of his own psychopathic mental state, and fills the sewers with corpses, including those of a pregnant woman and a little girl. When Niko and Cal try to stop him, Sawney skins their Boggle ally alive, boasting that her hide is filled with a mother's love and will keep him warm on cold nights. He has a particular interest in Cal whom he tries to [[IAmAHumanitarian devour alive]] because of his Auphe heritage. "Abide in me traveller. Special boy with with special taste. The taste of [[AxeCrazy madness.]] The taste of me."
* HoYay (or Bro Yay if you so desire). The three male main characters have the FanNickname of "The Holy Trinity of Hotness."
** In ''Roadkill'' Cal compares his relationship with his brother Niko to Robin and Ishiah's. The difference being that Cal and Niko are both quite heterosexual, while Robin is...''enthusiastically'' pansexual. Robin and Ishiah are lovers.
* NightmareFuel
* {{Wangst}}: Cal has a metric asston of this, but for good reason.