Tropes that apply:
Hot Blooded: She's very passionate about... Pretty much anything, she gets easily excited about food, music, and possibly her greatest passion: "Saving the world!"
Knight Templar: KT considers all crimes to be equal, she gets enraged at the slightest offences, such as littering or jaywalking, and tries to "reform" or "imprison" people based on their "redeemablity".
Genki Girl: This girl has energy to spare! She tires out other people around her with her antics, though that might be the super-stamina taking quick effect.
Super Speed: Her powers are just what it says on the tin, but her powers are controlled through a force field around her body (think Speed Force from the Flash comics.) Her reflexes are sped up as well, making easy to react appropriately to attacks, but hard to slow down, with her reflexes being slower to turn off than her super speed itself.
Innocent Aliens: She wants nothing more than to make friends with humans, she partakes in "earthly activities", which causes her to not relate to her fully alien friends as much as she would want to.
For Great Justice: After not being able to save her father during a attack (her powers were not activated at the time), she vows to protect and save friends, strangers and foes alike.
Half-human Hybrid: Her mother was a alien and her father was a human, she empathizes with humans a lot more than her alien brethren, and she's unable to speak her home language.
Given Name Reveal: Her real name is Katy Lynx, she uses the acronym K.T. to hide her real name and half-human half-alien nature, since non humans tend to see hybrids as vulnerable targets to kill off.
Cool People Rebel Against Authority: She doesn't like being restricted by rules despite enforcing hers onto other people, she really despises being told off by people older or more powerful than her.
Hates Being Called Cute: She finds it demeaning, she doesn't like having her young age mentioned at all, and prefers being treated as an equal.
Tomboy With A Girly Streak: She has a very tomboyish personality. she likes things that are considered gross: bugs, she doesn't mind getting dirty, and without supervision, she would probably eat spoiled food. She also loves cute things and takes great importance in her appearance.
Big Eater: Her powers give her a high metabolism, as she burns alot of energy. Her favorite foods are ramen noodles, pizza, and other junk foods.
The Perfectionist: She believes that she and other people should be perfect because that could "make earth a better place", whenever she makes her own mistakes, she goes basically through the five stages of grief before finally accepting it, no matter how small the mistake is.
Arrogant Kung Fu Guy: When in battle, she loves spouting snarky comments and condescending remarks at her attacker/attackers (However this might be covering up her fear and nervousness) she's very confident in her powers, finding new, flashy and creative uses for her superpowers.
Girlish Pigtails: She wears her extremely long hair in two big pigtails, reinforcing her youthful appearance.
Rapunzel Hair: (see above example)
Curtains Match The Windows: She has green hair and green eyes from her mother's side.
Cuteness Overload: She adopts a mutated slime monster because after she fought it, it "looked cute", it ends up naming Alberto.
Cloudcuckoolander: other than the above example, she has a wild imagination and her plans for battles are often strange and disconjointed.
Book Dumb: She's not the sharpest tool in the shed when it comes to intelligence, she often relies on others to help her in that case.
Power Of Friendship: She values her friends and teamwork as much as she values her family.
Fragile Speedster: She's able to do hand-to-hand combat, but she gets knocked out easily if hit enough. After being knocked down, she's knocked down for a long time.
Berserk Button: Questioning her morals or bringing up her age tends to make her angry. Commiting a crime in any way does this as well.
Civvie Spandex: She wears a aerodynamic shirt and pants, with winged sports sneakers and a green jacket.
The Cape: She follows a strict code of honor and always follows her heart and gut instincts. She subverts the "authority" part however, by disrespecting police officers and even the government. She is very selfless, but not really humble. She refuses to kill, yet sometimes she uses too much force when it's not needed.
Thou Shalt Not Kill: She believes that anyone can be redeemed, and if not, she will simply imprison them. K.T. in all cases, refuses to kill.
Chronic Hero Syndrome: A trait she shares with her father.
Vigilante Man
Doesn't Like Guns
Reckless Pacifist
All Crimes Are Equal
The Gadfly
Lawful Stupid