Badass Long Robe: Victoria when in her battle costume, which incorporates Allister's long robe. Allister as well, of course.
Beard of Evil: We're not quite sure yet. All we know is that the beard in question belongs to a guy who knew Allister when he was alive, and who may or may not be responsible for killing him.
Black Magic: Most magic gets this reputation with non-magic users, particularly with Cooper's parents. Subverted in that this isn't actually how magic works at all.
Bling of War: Allister's (and Victoria's) battle costume has various bits jewelry incorporated into it (most prominently with Allister's ring) that serve solely cosmetic purposes.
Breast Plate: Though hardly a Chainmail Bikini (it's more of a frontal torso plate supplementing a long robe), it's still rather form-fitting. Allister doesn't wear any equivalent armor, though probably because he never needed to.
Cat Girl: Victoria is randomly drawn with cat ears when she's embarrassed.
Chekhov's Gun: Flashbacks of Allister fighting monsters show a number of monsters that Victoria eventually goes on to fight, including a hellhound and a harpie.
Clark Kenting: In combat mode, Victoria just looks like a blonde version of herself in a different outfit.
It gets even more transparent when Victoria's battle costume evolves, revealing more and more of her own purple hair. Needless to say, Patrice and Bethany are hardly fooled when they first see Victoria in her battle costume.
Costume Porn / Unlimited Wardrobe: Very, very much. Victoria never wears the same outfit two days in a row. Even her standard battle costume changes as she learns more powers.
As of Chapter 16, Victoria has re-used all of one outfit: her Sailor Fuku, first worn in early Chapter 1 and worn again in Chapter 14. Also seen (carried, not worn) in the cover art for Chapter 3.
Apparently all of it. Static electricity is a very simple version that anybody could do, probably without even realizing it. Even the more exotic spells (mostly involving energy transference) are supposedly within the capabilities of normal people, though training may be an issue.
Subverted with stuff like spiritual possession, creating sentient familiars, and Allister's final spell, which tend to toe the line towards the blatantly fantastic.
While brushing up on his physics, Cooper can be seen reading "Chemistry for Noobs".
Geek Reference Pool: Defied by Victoria, whose nerd specialties are in history and textiles rather than the more stereotypical math, science, and information technology.
Giant Poofy Sleeves: A feature in many of Victoria's outfits, including the initial version of her battle costume.
Mundane Utility: Most sorcerers are savvy enough to use their powers for making everyday tasks easier.
Cooper uses hypnosis to keep his employers from firing him, and to ward off bullies when he was younger.
Victoria contemplates the use of magic for self-defense, not against monsters, but against gun-wielding New York muggers.
Averted when Victoria offers to help Renard by carrying his priceless artifacts with a wind spell. Renard is not amused.
Mysterious Past: Allister always changes the subject when Victoria tries to ask him about intimate details of his life.
New Powers as the Plot Demands: Victoria doesn't so much learn her magic through practice, but by mastering it on the fly. Usually in the middle of a fight, right when she needs the new power.
Oh Crap: When Victoria tries to create her own familiar and winds up creating a monster instead.
Outgrown Such Silly Superstitions: In the past, people thought science was actually magic. In the present day, science has largely caught up.
Powers via Possession: While symbiotically possessed by Allister, Victoria has all of Allister's raw power to draw on, but she has to learn to cast her own spells. When being "traditionally" possessed, Victoria can use Allister's spells, but Victoria herself won't be conscious for the duration.
Secret Identity: Allister suggests that Victoria maintain one so as to preserve the general peace. Nevertheless, Victoria's family, and later her friends (except Ben) are actually in the loop about her magic, much to Renard's surprise.
Shoot the Dog: When Victoria has to destroy the familiar she improperly created.
The name of Victoria's primary electric attack spell is "Static Shock".
Victoria mentions having watchedPokemongrowing up when Cooper zaps himself by stepping in a puddle and using an electric spell.
Another Pokemon reference: Victoria names her familiar "Umbreo", a name close to Umbreon.
Victoria has a plushie of Kikki or Mimmi (the author's "resident spokeschibis") in her room. Both Kikki and Mimmi reappear (along with the author's logo) as advertisements in Times Square in Chapter 16.
When Bethany imagines what Victoria looks like as a magical girl, she envisions Victoria dressed in Mew Ichigo's battle costume.
A piece of bonus art in Volume 1 (and on the comic's webpage) shows Victoria and her friends dressing up for Halloween as various characters: Patrice as Wonder Woman, Bethany as Storm and Victoria as Sailor Moon.
Translator Microbes: Victoria explains to Patrice and Bethany, after they figure out that she knows magic that Allister can only speak French, but Victoria can magically understand him.
Possibly subverted when Allister appears immediately after the above scenario, speaking flawless English and explaining that he's also a quick learner.
Weirdness Censor: Most normal people who get caught up in a monster fight think little of magical monsters running amok. Newscasters seem to report on them as if they're completely normal, everyday things.
World's Smallest Violin: Patrice did this gag in response to one of Bethany's drama queen spiels.
Why Did It Have To Be Spiders: Victoria's greatest fear, revealed when she fights a giant spider monster. Naturally, that issue led to an Aesop about conquering her fear. And Renard having a purpose in Victoria's battles.
Write What You Know: Some of the Expo Speak makes it blatantly obvious that the author knows what she's talking about, such as when Cooper gets bitten by a monster and Victoria instructs Cooper to not tell the doctors it was a random animal bite due to the complications of having to identify the breed of animal and getting rabies shots.