Characters from Young Wizards. As usual, BEWARE OF SPOILERS!UNDER CONSTRUCTION There are many characters missing from this list, and most need more tropes added.
Not So Weak: In the first book it's much more obvious, but she does keep many of the same character traits. It's also apparently a useful set of characteristics for wizards in general, who aren't really supposed to do things for their own benefit.
Only Known by Their Nickname: Her real name is Juanita, but you can count the times she's referred to as such on one hand.
She Is All Grown Up: By the fourth and fifth books she's become an attractive young woman.
The Medic: In the first few books, Nita has an affinity for living matter and a natural talent for healing that makes her start to focus on healing spells. Until her affinity starts to change, anyway.
Technopath: Although all wizards are capable of this to some extent, Kit's specialty (with mechanical non-organic inanimate objects) has remained the same throughout the series, unlike Nita's.
Dairine Callahan
Annoying Younger Sibling: Dairine starts as this to Nita, but grows into her role as a wizard after the third book.
Ascended Fangirl: A borderline example with Dairine, a Star Wars fan who wants to beat up Darth Vader. (Borderline because, while she doesn't become a Jedi, becoming a wizard is pretty damn close.)
Child Prodigy: Both in regular subjects and in wizardry. She gets her Ordeal at eleven, which isn't the youngest ever by any means but still quite a bit younger than what's typical.
The White Prince: The arrogant type - also, arguably, the composed/reserved type, but definitely arrogant, though he starts to get better before he disappears
Badass Normal: He isn't a wizard, but he's just as powerful in his own way.
Though 'his own way' still isn't exactly normal.
Black Eyes of Evil: His eyes are completely black (though this is nothing out of the ordinary for a great white shark)
Dark Is Not Evil: He's an extremely sinister killing machine, but he's not evil, or mindless. He ends distress (by eating the distressed). Actually, he's portrayed a lot like The Grim Reaper.
Who Wants to Live Forever?: Nita speculates at one point that there may have only been one Master Shark ever (and in fact, there is a theory that sharks don't die of old age, only when they succumb to injury or disease), and some things Ed says make him seem terribly lonely...
The Lone Power
Aloof Big Brother: To the other Powers; the Lone One is frequently known as "Eldest, Fairest and Fallen", after all.
Big Bad: all minor villains answer to It one way or another; more to the point, It is implied to be at least partly responsible for all the evil in the universe.
Black Sheep: The Powers That Be kicked It out for inventing entropy and death.
Body Surf: Appears in lots of bodies over the course of the series, sometimes possessing mortals, sometimes as an aspect of Itself.
Cain and Abel: A variation with multiple Abels, since the Powers are more or less siblings.
Demonic Possession: has the ability, but it is very difficult to use effectively, especially on a wizard.
Evil Redhead: Appears in different bodies and doesn't look the same to everyone, but Nita usually sees It as a man with red-gold hair.
Fiery Redhead: The Lone Power is pretty hot-tempered. And he appears as a redheaded guy— Nita sees him that way, at least, in SYWTBAW and High Wizardry.
Deadpan Snarker: Not so much before, but definitely in A Wizard Of Mars.
I Just Want to Be Normal: Ronan Nolan, a young Irish wizard with the potential to be an avatar of the One's Champion, but who resists out of fear of losing his self if he allows such an awesome Power to manifest through his physical form.
Deadpan Snarker: Again, only in the last book or so— Wizards At War, arguably, and A Wizard Of Mars, definitely.
Locked Out of the Loop: If he ever learns that he's an abdal, he'll immediately a) stop being one and b) die.
Neurodiversity Is Supernatural: In A Wizard Alone, Darryl becomes autistic in an attempt to withdraw from the sensations of being malignantly observed by the Lone Power.
The Rainman: Though his autism is bizarrely portrayed (his behaviour on the outside is accurate enough, but his experience from the inside not so much), Darryl makes his first appearance as a severely autistic boy who also turns out to be a human conduit for a large amount of the wizardly power available to Earth.
Justified Trope: Darryl's autism is something the Lone Power has done to him; it's reasonable that it would only superficially resemble an organic condition.
What Beautiful Eyes: Darryl, who has eyes so innocent that it hurts the first time you see them.
Dogs Are Dumb: Subverted- he started out smart, and only got smarter as time went on after being around Kit for so long. He was always kind of a ditz, though.
Human Aliens: After they move planet and adapt themselves to suit the new surroundings. Justified by their having seen early humans and decided that shape looked suitable.
Starfish Aliens: We're never told what they looked like in their original form, but it's pretty clear it wasn't humanoid.