Who is this idiot who plays every character mid pretty much, why does he think phoenixes are gold and why is he so beautiful!?!?
As for the last one, i was born that way...the rest?....well...

Pro:

Being versatile enough to play ADC, Solo Top, and Jungle.
She does TONS OF DAMAGE™
Has a pretty effective blind, making her just as bad as Teemo.
A passive that grants extra amounts of TONS OF DAMAGE™
Her skin is soooooo HoOoOot~~~ lolol, im so....punny.......pwahahahahahahah

Cons:

Fairly short range for an ADC
Fairly low starting mana pool.
Squishy when focused, although... that's usually a problem for anyone who isn't a total tank.

Core
Long Sword - My personal choice of starting item. Gets you that head start towards buying your LifeSteal item, gives nice early Attack Damage too.
Boots of Speed - Because no one wants to take 30 minutes getting to lane.
Health Potion - Hope I shouldn't have to tell you why you should buy these..
Bilgewater Cutlass - Decent amount of Life Steal and Attack Damage considering the low price. Has a nice active too.
Berserker's Greaves - Attack Speed, Movement Speed, yup..
Blade of the Ruined King - It's insanely good, and 350 gold cheaper than The Bloodthirster.
The Bloodthirster - The standard AD Carry lifesteal item of choice.
Warmog's Armor - Grants tons of health and that regen combined with lifesteal is fabulous!
Atma's Impaler - Usual item chosen for a duet with Warmog's, grants armor and critical strike chance and need i explain it's passive..?
If's
Heavy Armor enemy team-
Last Whisper - Provides decent Attack Damage and high Armor Penetration
--Anything Else With armor Pen--

AP Heavy team
Magic Resist..

Weak Against
Caitlyn - Outranges.
Graves - High burst and farm deny.
Varus - Outranges.
Draven - You also counter him however, will be dependent on who outplays who the best.
Blitzcrank - Will pull you from your base to there's.
Ashe - outranges, can outfarm, stuns, plenty of hurt.
Karthus - He will wreck you if he's smart, but that can go for most champions.

Strong Against
Vayne - Don't get knocked into a wall and you will ruin her day!
Ashe - Hit her with your Q and boom!
Darius - Play it right and he won't be able to lay a finger on you.
Teemo - Blind him, beat him into the ground, and make him your b*tch.
Ezreal - Make him pop his flash and outdamage him all across the map.
Draven - Blind him, jump on him, press R and poop all over that gay moustache.
Gangplank - Blind him, jump on him, and squash those d*mn oranges!
Caitlyn - Press Q and win.

Last hit minions, hit the ones that valor wants you too hit and don't spam skills on minions...your not Ezreal....

Her Ultimate gives her crazy movement speed when out of combat as long as valor is in control, use this for good escape and rundown or just too move around the map as quickly as possible.

Harrier(innate)
Harrier is a passive ability that marks an enemy unit with Vulnerable once every few seconds. Quinn's autoattacks can detonate Vulnerable marks to deal bonus physical damage to the target.
Harrier's targeting priority is as follows:
Last enemy hit.
If the last enemy hit was a small minion, it appears to select a different target.
Lowest health enemy champion.
Lowest health enemy minion.
Valor must finish at least half the animation of marking the target for it to apply.
It is possible for a target to die after the animation starts but before the mark is applied. This puts this passive on cooldown.
The mark lasts 4.5 seconds.
Has a 10 seconds cooldown.
Lowered to 3 seconds if triggered.
Harrier will not activate while using the Stop command (S).
The bonus damage from Harrier benefits from life steal.
Blinding Asualt
Blinding Assault is a collision linear skillshot that deals physical damage and blinds the first enemy unit hit and other enemy units around its location.
While Tag Team is active, Blinding Assault is a point blank area of effect ability that deals physical damage and blinds enemy units in an area around Valor.
Blinding Assault procs spell vamp and Rylai's slow similarly with all area of effect spells and abilities with full effect.
Blinding Assault pops Spell Shield.
Blinding Assault will not damage Black Shield but the blind is negated.
Heightened Senses
Heightened Senses passively grants Quinn bonus attack speed for a short duration after detonating a mark from Harrier. When activated, Heightened Senses is a point blank area of effect ability that grants vision in a radius around Quinn.
While Tag Team is active, Heightened Senses passively grants Valor bonus attack speed. When activated, Heightened Senses is a point blank area of effect ability that grants vision in a radius around Valor.
Vault
Vault is a single targeted dash that causes Quinn to rush at a target enemy unit, dealing physical damage, slowing it and applying the Vulnerable mark on arrival. Quinn then dashes backwards a set distance.
While Tag Team is active, Vault is a single targeted dash that causes Valor to rush at a target enemy unit, dealing physical damage and slowing it on arrival.
Vault procs spell vamp and Rylai's slow similarly with all single target spells and abilities with full effect.
Vault pops Spell Shield.
Vault will not damage Black Shield but the slow is negated.
After completing Vault, Quinn (or Valor) will automatically be ordered to attack the target unit.
Both the initial dash and bounce back allow Quinn (or Valor) to pass through wall, given the user has the sight of the target.
Quinn may initiate the dash closer than the range of the ability, but the bounce back distance is constant.
However, if the landing position is within wall, Quinn will be repositioned before the point of collision.
Quinn (or Valor) is not invincible during the dashing motion and can still be targeted and damaged.
Vault will generate charge on Statikk Shiv. Vault only seems to generate half the charge you would expect, it is unknown if this is intentional.
Multiple enemies can be marked with Vulnerable. However, the application of Vulnerable will put Harrier on cooldown.
Grants additional 2 seconds of vision on enemy champions in the area on activation.
Tag Team
Tag Team is a self targeted ability that summons Valor to replace Quinn on the battlefield for a short duration. Valor has bonus movement speed that lessens while Valor is in combat. Valor also has melee range autoattacks and differing champion abilities.
A short cooldown timer exists between the first and second cast. (~4 seconds)
Valor shares the same stats as Quinn.
Quinn and Valor share cooldowns on their basic abilities.
If Valor dies during the duration Quinn will die too.
Valor is considered to be in combat when:
Being hit by enemy basic or ability.
Basic attacking or hitting an ability.
Cooldown timer starts after the second cast.
It does start as well on death.
SkyStrike
Tag Team is replaced by Skystrike while the ability is active. Skystrike is a point blank area of effect ability that returns Quinn to the battlefield, replacing Valor. Quinn also deals physical damage to all enemy units in a radius around her, dealing increased damage based on their missing health.
Skystrike procs spell vamp and Rylai's slow similarly with all area of effect spells and abilities with full effect.
Skystrike pops Spell Shield.
Skystrike will not damage Black Shield however.
Skystrike hits nearby enemies, even if they are not in sight...keep this in mind

Quinn is the first champion in League of Legends to have a name starting with the letter "Q".

Before the introduction of Quinn, "Q" was the only unused letter in champion names, meaning that Quinn completes the alphabet of champion names.

Quinn and Valor have separate champion portraits.

This affects things such as the minimap and kill callouts.

They are the first champion to have this feature.

However, their name in chat and on the scoreboard remains "Quinn".

Quinn is one of only 3 champions with a blinding ability, the other two being Heimerdinger and Teemo.

Quinn is one of the 9 champions who do not have a single skill that scales off ability power; along with Darius, Draven, Garen, Olaf, Riven, Talon, Vayne and Zed.

Quinn's quote, "We Demacians are no easy prey," is similar to the quote, "We Elves are not easy prey," by Sylvanas Windrunner, a High Elf ranger from the Warcraft franchise.

Relations

Quinn had a brother named Caleb who died in a tragic accident.

Quinn indicates that she has some insight on Talon's assassination style.

Quinn wrote that Jarvan IV was "not what she expected" after first meeting him.

Quinn wrote that Garen was "by the books" after first meeting him.

Valor does not respect Garen.