Cowardly Lion: Stan never gets over his instinctive fear of any and all potential and real threats but if Zev/Xev is in real danger he will always at least try to help her. The first evidence of this is as soon as "Supernova" when he refuses and even punches Giggerota when she tries to get him to abandon Zev and Kai on the doomed Brunnis and escape with her on the Lexx.
Beware the Nice Ones: She may be one of the nicest, most moral and compassionate people in either universe but she's also part Cluster Lizard and will not hesitate to hand you your ass if you get her genuinely mad.
Cartwright Curse: Every guy she ends up with tends to end up dead or disappeared by the end of the episode.
Half-Human Hybrid: She was turned into one of these when her love slave transformation process went wrong. Her other half comes from Cluster Lizard DNA.
Heroic Sacrifice: In "Terminal", in order to save Kai. She is resurrected in the next episode, however.
Howl Of Sorrow: She lets out one of these (combined with a Cluster Lizard screech) when Kai "dies" in "Giga Shadow".
Idiot Ball: She keeps a firm grip on this as she's pretty much the one responsible for getting the crew into almost every situation for the show's entire run; disregarding perfectly good advice, walking into dangerous situations and ignoring signs that things aren't right are standard for her. Partially justified due to her upbringing as she's not familiar with normal behaviour and is desperate for new experiences and adventure.
I'm a Humanitarian: In "Terminal", after being tortured nearly to death, she transforms from her normal human form into that of a Cluster Lizard, before proceeding to devour her captors. Also in Season 4 when she enters her mating cycle.
Vitriolic Best Buds: Eventually reaches this with Stan. She's the first to insult him and point out his shortcomings but she'll also be the first to leap to his defense. She even once killed what she'd believed to be a living version of Kai because he attacked Stan.
Evil Costume Switch: Kai is originally seen wearing a brightly-colored costume with a big emphasis on hot pink. In his Divine Assassin incarnation, he wears an identical costume which is entirely black. Subverted in that he wears the same costume after his Heel Face Turn.
Good Thing You Can Heal: He does have a habit of getting his head lopped off/getting dismembered/sliced in half. It's only a minor inconvenience for him.
Heroic Sacrifice: His end in "Yo Way Yo". Of course, after all of six thousand years he's wanted to be dead for real all along, but the scene is a Tear Jerker anyway.
Love Makes You Evil: Goes to great lengths to get rid of possible romantic interests that come between him and his obsession. Ocurrs most notably in Season 4.
Living Ship: And very living, most metal and control bits are clearly installed later. And the ship's living nature means it needs to eat.
Planet Eater: The Lexx feeds itself by stripping organic material from planets; in "Eating Pattern," when it lands on a planet where the surface is mostly barren, it seems to sift through the dirt for nutrients buried within; while in "Dutch Treat," it flies low over the surface and sucks up the more obvious nutrients (trees, grass, animals, the population of Holland) like a vacuum cleaner. On a few occasions, the Lexx will eat bits of planets it blows up, but doesn't get very much out of it since it's "just a snack".
AcCENT Upon the Wrong SylLABle: When he's shouting (ie. most of the time) he talks like this a lot. When he's talking in a lower, creepier voice, not so much.
Boomerang Bigot: He has a strong desire to exterminate all human life, in spite of the fact that he himself was fully human until he merged with the Insect essence, which is the cause of his desire to Kill All Humans.
Creepy Monotone: On a few occasions, he'll start talking in a very low, creepy, emotionless manner.
Man in the Machine: As previously mentioned, the only organic parts of him left are his head (attached to a floating jar) and some of his organs (contained and preserved in said floating jar), and he uses mechanical drone arms to do everything. Later, when his jar is destroyed, his head is transported to the inside of a four-legged Humongous Mecha instead.
There Is No Kill Like Overkill: When he promises to save the crew of the Lexx for last, he's not kidding; he waits until he's converted the entire universe into Mantrid Drones, then chases them with those drones. All of them.
Villainous Breakdown: "I destroyed a universe! I destroyed a universe! I DESTROYED A UNIVERSE!!"
Would Hurt a Child: He uses his drone arms to create the illusion of a space station made of candy to entice Norb into getting within his reach, before using the drones to chase after the poor kid and kill him, before using more drones to impersonate him.
Resurrective Immortality: He can return after being killed, once a certain time period had elapsed. Worse, he can choose where he will reappear, and what his appearance will be, making him a de facto shapeshifter.
You think you can destroy me? You think you can hunt the hunter?
Played by Minna Harkonen
Badass: Divine Assassins are indestructible cyborgs who can survive being blown up with a planet. Vlad is a Divine Executioner, the being sent to destroy Divine Assassins who have gone rogue.
For the Evulz: She agrees with Kai that there is no point in pursuing her directive to destroy now that His Divine Shadow is dead, but keeps doing it because it brings her pleasure.
Improbable Hairstyle: Even more so than Kai. Apparently the power of killers in the service of His Divine Shadow is denoted by the goofiness of their hair. The bigger the badass, the crazier the 'do.
Karmic Death: First she gets abandoned on a planet with the sun about to go nova because she kept ripping pieces off her moth to eat and telling it to shut up when it protested and then ends up being eaten when she reincarnates on Earth after getting a carnivorous plant excited about eating people.
Voluntary Shapeshifting: For most of her on-screen time she takes the form of a girl Stanley once had a crush on, having learned of the girl's name and appearance from his dreams. She also tends to shift into outfits that feature in Stanley's dreams, too (which, given that this is Stan we're talking about, are rather tight and quite revealing outfits).
Warm Bloodbags Are Everywhere: She is very matter-of-fact about this: she'd "prefer" not to eat her human friends, but deprived of other food sources, she would.