Achievements in Ignorance: Her lack of experience with Pokemon has led to her pursuing some of them that more experienced players usually dismiss, leading to surprising successes with Audino and Bibarel among others.
All Girls Like Ponies: Plays up an exaggerated version of this stereotype, and during her Barbie Horse Adventures LP, and squeals in a vaguely suggestive way over her horse. (She apparently actually does like horses, though, and even owned one once.)
Black Sheep Hit: Her blind Paper Mario 64Let's Play is her most popular project, and drew a lot of new watchers to her channel. However, its sense of humor is incredibly dirty even by her standards, as is the fact that it's so over-the-top humorous to begin with. So when she announced Journey, a number of her newer watchers expressed surprise that she would choose such a serious game—despite the fact that she's done a number of more serious projects, such as Shadow of the Colossus and ICO.'
Crosses the Line Twice: Invoked in some of her LP's, when she gives characters voices based on various outdated caricatures. In addition to lamenting the fact that she can't think of anything better and is thus offending everyone, she tries to play it up enough that it goes straight into ridiculous.
Dirty Old Man: She has her suspicions about... pretty much every old man in Paper Mario 64.
Disney Death: For a brief moment in Journey, it looks like the White Cloak is going to get eaten by a rock snake. But they escape just in time, for which Lucah is thankful.
Again in episode 61 when she fights the X-Yux. It takes up almost half of the episode.
Erotic Eating: Lucah, Donnabellez and Attacking Tucans all do it in her "Project Brave Heart" charity livestream as a challenge - Lucah with a taco, Donna with a banana and Tucans with a slice of pizza.
Evil Brit: The voice she gives Bowser in Paper Mario 64.
She also consistently refers to Kammy Koopa as Queen Elizabeth II, and reads all of her lines in an exaggerated version of the Queen's voice.
Heh Heh, You Said X: She can find innuendos in just about anything. And it's one of her favorite things to do when playing a game.
Hello, Insert Name Here: She and Josh Jepson can't wait to name their horse something immature in the Barbie Horse Adventures LP. They find out the game only allows you to choose from a list of pre-set names, but they insist their horse is named "My Balls" anyway.
They also named their game file "Dickbutt."
Barbie's friend, Theressa, is called "Vagisil", and her baby horse at the end she delightfully names "My Penis".
The theme continues in the sequel with the aid of fan suggestions, leading to horses named "Your Virginity", "President Haemorroid" and "Fappy Cow" among others. And all the foals are named after venereal diseases.
Large Ham: She has a distinct "deep voice" she uses when she's being over-the-top. She's also one LPer who isn't shy of showing her face online, and she hams it up in front of a real camera, too.
Larynx Dissonance: In Paper Mario 64, she gives Tayce T. a very deep "old man voice." She has no idea why she does this, but sticks with it due to Rule of Funny. (OK, so she's female herself, so it's kind of a zig-zag.)
Older Than They Look: Is in her mid-thirties. Could easily pass for a decade younger. In a bit of an unintentional Running Gag, this always newly astonishes a large number of commenting fans every time she shows herself on camera.
Only Known by Their Nickname: Even when she appears on camera herself, or in videos at cons, she is almost always referred to as Lucahjin or simply Lucah.
Parody Names: Usually really immature ones. For example, in Pokémon White she refers to Cheren and Bianca as "Chinhair and Pee-on-ya".
Plucky Girl: During her fight with Pelagia in Shadow of the Colossus, not only does she express open disdain for the colossus, but she also had multiple failed recordings and was drunk at the time. She also tried to use a nonconventional method to beat the colossus to prove it could be done. Despite failing, repeatedly, she kept with it and eventually won.
Power Creep, Power Seep: When she participated in Josh Jepson's Mario Kart anniversary celebration (as well as MrRepzion and Super Jeenius) she did badly on all the more recent games, but very well on the SNES original as she grew up playing it.
A lot of videos include her commenting "if you can hear X in the background, it's Y", usually being the antics of either her cat or her neighbours. Almost invariably the sound isn't audible on the recording, which only makes it funnier.
The name "My Balls" seems to be one, seeing as how she named a horse in her Barbie LP this, and would go on to use the same name for her Zebstrika in Pokemon White and her baby Yoshi in Paper Mario: The Thousand-Year Door.
When reading out in-game instructions, replacing any reference to buttons with "blah". Josh Jepson does a similar joke, it's not clear whether they came up with it independently or not.
In Pokémon White, reacting to the game text "What will My Balls do?" with "What will you do, My Balls?" in a pompous tone.
Also from Pokemon White, when she gets a gym badge, singing "We got a thing, it looks like a thing, and we put it in our birth control case!"
A third from Pokemon White is semi-singing "Quick Claw is the best!" whenever that item activates and lets Snuggltits go first. By the end of the LP she's saying that she expects her viewers to be saying it along with her.
Springtime for Hitler: In Pokemon White she keeps one-hit-killing the final Pokemon of gym leaders so she never hears the last-Pokemon music. After a while she tries using deliberately bad choices of moves to try and hear the music for longer, but it always seems to somehow result in another One-Hit KO.
Squee: In-universe, she loses it on learning that she can name the Yoshi baby in Paper Mario: The Thousand-Year Door... and that there are exactly enough letters for her to name him "My Balls."
Tomboyish Name: She often abbreviates her real name Risa to 'Reese' leading to this. Her username is also a more obscure example of this, as she has said it comes from combining the (female) character Lucca from Chrono Trigger with -jin, which is a masculine name suffix modifier in Japanese.
What Do You Mean, It's Not for Kids?: In-universe: Her and Josh Jepson's incredibly immature take on Barbie. Numerous commentators have noted they pity the poor little girl who just wanted to watch someone play a Barbie game... Lucah herself eventually added a disclaimer to the video saying it was definitely not for kids.
Amusingly, at PAX East 2012, she gave away a "MAH BALLS" t-shirt to... a little girl. Who had indeed seen the videos. (OK, so she wasn't that little—she was probably around 13—but still.)
With Lyrics: She sings several different sets of Toilet Humour lyrics to the upbeat Pokemon Centre music in Pokemon White (some of which were submitted by fans). At one point she also hummed wordlessly along to the Tetris theme music but replaced the last two notes with "...MY BALLS!"