Rather than give out profiles for Inquisitor Haines (since there are a few things that I'd rather not reveal until after we start), Andreas, or Rowena Memphis (who is dead), I'll link some (not all, some) relevant tropes so that you have a rough idea of who the characters are.
Madoc Haines:
The Big Guy: Comes in at 6'10", and he's built like a brick outhouse.
Mighty Glacier: See above.
Genius Bruiser: He's an Inquisitor. Comes with the job description.
Artificial Limbs: Both arms and his
spine are cybernetics.
Drop The Hammer: He's Ordo Malleus, and lugging around a
thunder hammer that's
about as big as he is.When All You Have Is A Thunder Hammer: Haines doesn't always resort to this, but the threat of being smacked with a gihugic hammer can come in pretty handy from time to time. Also useful at bypassing door seals.
Hand Cannon: Carries a bolt pistol as a sidearm.
Playing With Fire: Carries a hand flamer as his
other sidearm.
First Gray Hair: Inversion -- Haines has more grey than the average British summer sky, but doesn't care much. Extends to his
beard.
Combat Pragmatist: With something as lethal as a thunder hammer, it's pretty difficult for this trope not to take effect somewhere along the way.
Andreas Tuominen:
Gentleman And A Scholar: Though you'll have to take my word for it for the moment.
Weak But Skilled: Because he wouldn't be an Inquisitor's aide if he couldn't take care of himself.
Servile Snarker:
Haines: And how much ammo?
Andreas: Three cells. Which is three more than you have, my lord.Hand Cannon: Haines owns a
plasma pistol, but it's usually Andreas that carries it (or so Andreas claims)
Rowena Memphis:
Fake Video Camera View: See prologue.
Predecessor Villain: If Haines is to be believed.
Lightning Gun: Carried a Dalek death ray as a sidearm. I wish there were an easier way to describe that.
Psycho Electro: Mild version, stemming from the above.
The Heretic: From the Imperium's point of view. From her point of view,
Defector From Decadence applies instead, mixed with
Humans Are Bastards.
Nietzsche Wannabe: Had shades of this.
Blondes Are Evil: In this case, yes they are.
Mood Swinger: Usually ended up somewhere around "impulsive" and "quixotic". I blame my earlier writing style not exactly matching up to modern standards.
EDIT: Some for the antagonists.
Kalen Goruvich:
War Is Glorious: He's a World Eater. He's going to believe this.
Blood Knight: World Eater.
Ax Crazy: World Eater.
Proud Warrior Race: XII Legion.
Determinator: He's survived so many wars that he doesn't remember how long he's been fighting. Most recently, he survived the massacre of his own strike force, and all that did was
piss him off and give him a reason to hunt down Agares.
Evil Weapon: He bound Agares into his own hellblade. That sword's gonna be pretty damn evil.
NO INDOOR VOICE: Every one of his lines that we've seen so far has been shouted very angrily.
Zagan:
The Soulless:
Zagan: I died at Skalathrax, and now I exist only to kill and to make myself whole once more.Shell-Shocked Veteran: Skalathrax did horrible things to Zagan's mind, which considering he's a World Eater is saying something.
Neutral Evil: Doesn't have enough emotion left to be either Lawful or Chaotic Evil.
Large Ham: Despite also being
The Stoic.
The Unfettered: Aside from point 5, from what we've seen so far.
Combat Pragmatist: He doesn't bother engaging an enemy fleet himself. So he makes the enemy fleet itself do it for him...
Cool Starship: Even by the standards of the Imperial Navy, since grand cruisers are
ancient. Not to mention the upgrades (we've already seen his
shields shrug off a nova cannon shell, for example)
Magic From Technology: How his
Technopathy works. Minor overlap with
Demonic Possession and
Puppeteer Parasite.
Varachen of the Flayed Skull:
Deal With Khorne: Which probably won't end well, knowing Khorne.
Disposable Vagrant: Arguably from Khorne's point of view, and from the point of view of whoever backstabbed him.
Damaged Soul: Whether Varachen has ever been "resurrected" by Haemonculi is open to debate, but he does fit the trope well enough, if only because of Slaanesh munching on his soul.
Cold-Blooded Torture: His lifestyle post-backstab started off as this, because he
Loves The Sound of Screaming, but eventually he had to escalate that into full
Ax Craziness because the longer he stayed away from Commoragh,
the worse it got.
Will add more stuff, possibly actual profiles, when doing so becomes relevant.