S1 - Ep 5: The First

With the start of the 2nd Story Arc, Luz meets her predecessor of her Quirk in the "Vestige World" and learns about the superpower she has inherited.

This chapter contains examples of:

Addictive Magic: All For One claims that his Quirk gives the bearer an inherent addiction to stealing Quirks, but it's implied that he is lying to encourage her to start gaining Quirks, attributing to the Quirk something inherent to him, or both.
Armor-Piercing Question: After explaining what her Quirk does, Luz vehemently makes it clear to All For One she would never take another person's powers, Addictive Magic or not, until the supervillain stops her in her tracks with one question.
All For One: What if you end up attacking Julia?
Bad Powers, Bad People: Unlike Luz, Shigaraki plays this straight. The ability to steal powers from people and forcefully implant them into others is about as villainous as it sounds.
Bad Powers, Good People: Being a Power Parasite isn't usually a power that you would associate with a Nice Girl like Luz, is it?
Badass in a Nice Suit: All For One, his world's oldest and the most powerful Super Villain, is never seen without an impeccable black business suit in Luz's mindscape. She notes how it's almost like a metaphor, how his appearance and reputation projects the image as if he were seemingly spotless.
Butterfly of Doom: All For One briefly mentions that the Butterfly Effect is a thing.
Call a Rabbit a "Smeerp": Luz is thrown to learn that the term for someone with superpowers in All For One's world is "Quirk user", rather than the more generic term "superhuman" in her world. The Supervillain is amused by the culture shock.
The Chosen One: Shigaraki calls Luz this for being his Quirk's successor. This excites Luz until he explains what her power is.
Curiosity Is a Crapshoot: Luz blames her ADHD for being hyper-fixated on something as dangerous as trying to get information from All For One about their Quirk. Fortunately, it appears he means the girl no harm and wants make Luz his successor.
Disappointed in You: Downplayed. All For One admits he finds himself a little disappointed that Luz had yet to use her Power Parasite Quirk. He points that the hospital she visited was full of children around her age with Quirks and she would've been on the road to becoming the strongest human being this world would ever know. Though, in Luz's defence, she had no idea what her Quirk even was.
Evil Laugh: All For One does this sometimes, freaking Luz out.
Finger-Tenting: All For One does this when explaining their Quirk to Luz.
Gratuitous Japanese: At one point, All For One, mutters something to himself in a different language that Luz recognized to be Japanese.
Genre Savvy: The moment Luz laid eyes on Shigaraki, she could tell he was evil in all CAPS and would try to manipulate her.
Hates Small Talk: Implied. All For One is pleasantly surprised that Luz wants to cut to the chase on who he is and what he wants, sounding almost joyous.
Hero's Evil Predecessor: Luz is the second holder of the All For One Quirk, who has a much stronger moral compass than the previous one. Unfortunately, the Quirk also comes with Shigaraki's spirit who intends to Corrupt the Cutie.
Irony: When Luz first meets All For One, she asks him if he's a demon. Laughing, he tells her while he has been called that a lot, he's just as human as she is. However, his personality is far more monstrous than any live demon in The Owl House universe.
Obviously Evil: Before Luz even said 2 words to Shigaraki, he set off her "Warning: This man is clearly EVIL" alarm the moment she lays eyes on the scary-looking man with a Slasher Smile.
Manipulative Bastard: A specialty of All For One's who manipulates people and events around him without ever getting directly involved. Luz accuses Shigaraki of being this from the beginning and she's not wrong, forcing him to be more subtle with a More than Mind Control and Villain Has a Point approach.
Meaningful Name: The story gives All For One the full name of Shigaraki Rikitasu, meaning "A multitude of splendid powers of death", which is quite fitting for a man with Power Parasite abilities who is a dangerous Card-Carrying Villain.
Mental World: Shigaraki resides in Luz's dreamscape after his death at All Might's hands in his own world around the same time as the Mass Super-Empowering Event. He refers to it as the "Vestige World". Luz is not at all happy to have the spirit of a Card-Carrying Villain in her head that can drag her here anytime she falls asleep.
The Multiverse: All For One explains to Luz that the multiverse theory is a real thing and its not just her world and his world that exist, though theirs are parallel and linked to each other. He notes that their are various off-shoots of their respective universes, all intermingled into one another. In short, there isn't just one big universe, but multiple, all of which are interlinked in someway; some with small changes such as drastic as World War II being won in the Axis Powers' court, to something as small as Luz not waking up at 7:30 AM on the day of which she was meant to go to Reality Check Summer Camp, and instead woke up a minute earlier than that. A small change, but drastic enough to warrant another universe being created.
Mythology Gag:
- All For One mentions to Luz he already had a successor in mind as to whom would receive his power. That person was Tomura Shigaraki.
- He also mentions he's been called a demon before. This suits him just fine as he wants to emulate Maou the Demon King.
- In addition, he lets Luz know he can call him sensei. Just like what Tomura calls him in canon.
Named by Adaptation: All For Luz gives All For One "Rikitasu" as his first name
Perpetual Smiler: Shigaraki's habit of giving predatory smiles gives Creepy Uncle vibes to Luz. (Ironically that's one the few crimes he's NOT guilty of).
Red Eyes, Take Warning: Shigaraki has these and Luz can tell he is a dangerous character.
Right for the Wrong Reasons: Luz considers the possibility that All For One could a stalker towards her. She soon dismisses the notion because no one would want to prey on her, not because she (initially) thinks All For One isn't guilty of those sort of crimes against minors.
Slasher Smile: Shigaraki constantly cracking wide, toothy grins whenever he's getting particularly emotionally worked up, smug, or satisfied with his results, which helps sell to Luz when they first meet there's something off about him.
Slouch of Villainy: All For One does this on his chair in the Mental World in his Establishing Character Moment to Luz. She notes he acts like a king on his throne looking down on a peasant.
Stalker with a Crush/ Stalker without a Crush: Luz muses the possibility that All For One could this towards her, considering he knows who she is but not vice versa. In the end, Luz dismisses this idea as she considers herself too weird and too much of a nuisance for anyone to be obsessed with her.
Superpower Lottery: The All For One Quirk can steal Quirks from others, dead or alive, and wield them as their own. Luz could also combine the Quirks she has for stronger attacks. She can also give the Quirks to others. As Shigaraki explains, in a world where Everyone Is a Super, the one who can steal powers and give them to other people is the king.
Unreliable Expositor: It's made clear that Luz should take anything that All For One says with a grain of salt. For example, he claims that his Quirk is unique in The Multiverse, but even disregarding the Nine incident his plan canonically involved copying his Quirk and passing the original on to Tomura, which would have been made impossible to even attempt by this if what he's saying is true, and his brother having a similar Quirk that would become One For All proves that the All For One Quirk isn't an exception to Quirks having a genetic basis. He also claims that his Quirk comes with a built-in craving to steal Quirks, but it's entirely possible that he's just trying to push Luz into starting to steal powers.
Villain Has a Point: When Luz claims she'll never use her Power Parasite Quirk no matter what, All For One points out that the Addictive Magic that comes with it could drive her to attack people, including her new friends, in a fugue to satisfy her urge and could destroy her new friendships. Luz notes that could very well be a possibility.
Villain Respect: Averted. All For One is NOT happy about the fact that someone he views as an "oaf" like All Might killed him.
With Great Power Comes Great Responsibility: Luz dryly asks if All For One, of all people, is gonna try and pitch this to her. She finds it cliche and lame.
Year Outside, Hour Inside: Downplayed. In Luz's dreamscape, 5 minutes here, is 50 minutes in the real world.
You Remind Me of X: When Luz calls their Power Parasite Quirk evil and wrong, Shigaraki muses she sounds just like his younger brother.