Beam Spam: Well she is Nanoha's clone after all. She diverges from being a mere copy of Nanoha in G.O.D, where her attacks are faster and have more shots. Her charged Disaster Beat (her version of Nanoha's Divine Buster) fires three consecutive shots instead of one long beam.
Blood Knight: When she is beaten in Nanoha's route in the Battle of Aces, she would state that it was a good fight while smiling and if given another chance, would challenge Nanoha again. She also made a promise with Nanoha that they'll have a rematch even if they reunited after Nanoha becomes an adult.
It's this promise that makes her try to stop U-D (and Dearche) from destroying everything. She wouldn't be able to fight Nanoha if she were dead!
First Name Basis: She calls people directly related to her by their first names; Nanoha for being her original, Levi and Dearche for being her allies. She refers to everyone else by a title (refers to Hayate as "Mistress of the Night Sky" and as noted below calls Yuuno "Master" for being Nanoha's magic teacher).
However, when speaking Nanoha's name, it is written in Katakana instead of Hiragana.
Friendly Enemy: When she and Nanoha meet again in Gears of Destiny, the first thing they do is exchange pleasantries.
Heroic Sacrifice:gives Dearche her remaining powers after succeeding in wounding U-D at the cost of her life,
Hypercompetent Sidekick: Confirmed as Dearche's right-hand. She found out the information regarding U-D's nature and origins, negotiated with the heroes for their cooperation, and even provided everyone with a method of defeating U-D herself. As competent as she is, she is content on playing second fiddle to Dearche, in fact, all of her plans were made with Dearche's benefit in mind.In the end, she is shown to be the one managing the restoration of Eltria, with the help of U-D/Yuri.
Irony: As Nanoha's dark copy, she's supposed to be evil, but actually she isn't. In the Gears of Destiny Drama CD Side-A, she fights against adult Nanoha and lost to her, then Teana lampshades that Nanoha is merciless as always.
Japanese Honorifics: Calls Yuuno "Shishou" after he manages to win against her, proving that she acknowledges him as her original's master.
Morality Chain: To Dearche. Sees no logical reason to kill people off/cover the land with darkness, and with Levi convinces Dearche not to be an Omnicidal Maniac.
The Plan: She enlisted the help of the heroes to develop countermeasures against U-D, while formulating a plan of her own. She restrains her fellow materials, telling them her plan to act as the first wave against U-D to weaken her defenses, entrusting Levi to act as Dearche's protector. If she succeeds, then her fellow materials would be able to succeed in capturing U-D, if she failed then Nanoha and the others would be able to finish off her job. Whatever the outcome would be, she informs Dearche that only her device would be able to completely control U-D's powers, allowing her to gain the limitless powers she had sought for.
Playing with Fire: She says she acquired the "powers of the Destructor" in the time between the games, leading to her powers being fire based, but has no idea why fire, of all elements.
The Smart Guy / The Spock: She is the Material of Wisdom, and true to her designation, she will always take the most logical course of action when dealing with various situations. Of course, this sometimes puts her at odds with Dearche, but the latter is willing to listen to her reasoning, despite expressing displeasure over the former's lack of respect. Stern will be quick to point out that she respects Dearche, but does not confuse it with logic that would help further their plans. These traits also made her the first to undergo a Heel Face Turn, since to her, it would be highly illogical for Dearche to destroy everything, coupled with the fact that she and Nanoha have a rematch to do.
The Stoic: Unlike Nanoha, she shows almost no emotion.
Undying Loyalty: To Material D, to the extent that she is willing to take on U-D alone knowing she has no chance but simply to weaken her defenses, just so Material D can defeat her and take her powers. She gives Dearche her remaining powers after suffering heavy injuries so she will have a higher chance of succeeding when she battles U-D
Material S: I am the flame that opens the path of my king...Even if I am extinguished, I will have no regrets.
An Axe to Grind: Vulnificus Crusher is the counterpart to Bardiche's Assault Form.
And Then What?: Fate asks her what would they do after they acquired the powers of the Unbreakable Darkness. Levi's answer was "I don't know, haven't thought about it." She justifies this reason by stating that she only obeys what Stern and Dearche command her to do, since the two of them do all of the complicated thinking.
Brilliant, but Lazy: As a Material, Levi can come up with technical knowledge just like the other Materials and she understands it. For the most part, she chooses not to. Lampshaded in a conversation with Fate.
Buffy Speak: She calls blue lollipops "blue swirly round things."
Cannot Keep A Secret: In Battle of Aces, Shamal tricked her into giving out information. In Gears of Destiny she is easily bribed with a Lollipop.
Dumb Muscle: She can break a bind spell using brute force allowing her to escape Stern's bind spell and catch up to her, which she lampshades. She also stated that she leaves all the thinking to Stern and Dearche, simply following whatever they order her.
Fragile Speedster/Glass Cannon: In G.O.D, her actual defense rating in the game is exactly the same as Fate's meaning below average in normal form and worst defense when in Sprite Form. It's mentioned in a Sound Stage that Levi actually has less armor than Fate.
Friendly Enemy: She greets Fate happily and shows off her new and improved self in their meeting in G.O.D. She says that their behaviors in the Battle of Aces were similar to sleepwalking. She even gets along with Reinforce.
Genki Girl: In contrast to Fate. And more Genki then Alicia. Actually, she's the most genki person in the whole franchise.
Heroic Sacrifice:Assists Material S in her plan to weaken U-D's defenses. They succeed, but end up heavily injured, so she decides to give her remaining powers to Material D like Material S.
Hidden Depths: She thinks and acts like a child, and Material S stated her program parameters are simple. However, she's able to explain the nature and origins of Materials like herself, which surprised Fate a lot.
Lightning Bruiser: In Battle of Aces she has the passive skills of both Fate and Signum.
The Nicknamer: She is apparently bad with names, unlike Stern, who prefers referring to people other than those related to her with a title, or Dearche, who doesn't even bother knowing the names of people other than her retainers and Yuri.. The only exception to this is Stern, Dearche (who she addresses as "Your Magesty" because that's what she wants) and again, Yuri. Some of the people she gave nicknames to are...
Fate (ended up pronouncing "Hate" and it's troublesome for her) -> "Original"
Hayate -> "Little Raven/Crow" or "Dumb Raven/Crow" (Dearche call her this too)
Reinforce (Which is too hard to say yet she still said it) -> "Kurohane (Black Wings)"
Undying Loyalty: To Material D as she's perfectly willing to sacrifice herself like Material S, so that Material D can gain U-D's powers.
Unskilled, but Strong: When beating her in their respective storylines, Chrono and Fate both note that although she's as strong as she claims to be, her attacks are fairly simple to dodge because she swings too wildly and she has a tendency to use flashy moves. She says because she's the Material of Power, she feels her attacks need to be big and flashy.
You Remind Me of X: Levi reminded Fate of Alicia, because of her Aqua-Blue magic color and her Energetic personality... Or not.
Break the Haughty: Her loyal retainers sacrificing themselves didn't really sit well with her. This is also what leads her to fully cooperate with the heroines, intent on finishing the task of saving U-D.
Conservation of Ninjutsu: Her first appearance in Gears of Destiny has her handling the heroes all by herself. She would have won, if her two subordinates hadn't showed up and taken some of the mana that she was utilizing, causing her magic levels to drop.
Hey You: She never calls (and even bothers calling) anyone other than her two subordinates and Yuri by their name.
Hidden Depths: She's haughty, self centered, and seems hell bent on gaining power so that she could destroy the world. Her actual motivation for seeking the power of the Unbreakable Darkness is to provide a place for Stern and Levi to do whatever they please and go wherever they want. This is why she initially refused Hayate's offer of help, saying that she did not want to be indebted to others for something she can obtain by herself.
Jerk with a Heart of Gold: Despite her attitude towards her retainers, she genuinely cares for both of them. When the two of them end up heavily damaged after succeeding in injuring U-D, she goes to their side and tries to transfer some of her magic power to them. She even refused and desperately ordered them to stop when they transferred their powers to her.
Kneel Before Zod: One of her attacks is a counter-bind spell, in which she says "Kneel before me!" when it connects. She also says this on some parts of the story in G.O.D
Large Ham: Spends most of her time chewing the scenery, and the remainder lampshading it. In G.O.D., she mentions that she spent the break between the games practicing her Evil Laugh.
Omnicidal Maniac: During the Battle of Aces. The other Materials keep her from this path in Destiny.
Otaku: a minor one. When Kyrie suggested that her final form when she acquires U-D's powers would look like a giant cartoonish robot, she thinks it's cool. Reinforce and Hayate don't know what to think about this.
Power Gives You Wings: Has black wings like Hayate. And then, her wings glow red and blue after getting Stern's and Levi's powers.