Guess the Character

[Misty_wolf_of Alagaesia]

That would be most definitely be Oliver Wood.

1)Head of a House.
2)Rather good tempered.
3)Teaches Charm's
 

[EvelynPrince]

That would be Professor Flittwick I guess!

1. Pureblood witch
2. marries a muggle
3. dies giving birth to her son (or shortly after)  

[vballlvr5]

Voldemort's mom Merope Gaunt

~ patronus is unknown
~ takes Angelina (sp?) to Yule Ball
~ member of DA  

[consultingarchangel]

vballlvr5; Gah, I can't remember which of them it was-- it was either Fred or George. Don't shoot me ^^'

I'm not sure if this one's already been done, but hey.

1) He plays seeker in Bulgaria's Quidditch team
2) He has a crush on Hermione Granger
3) He and Ron have a somewhat... strenuous relationship.

Obviousness~  

[vballlvr5]

the answer to mine was Fred

Yours is Victor Krum


~is an animagus
~loves their quick quills pen
~journalist  

[llililolo123]

Rita Skeeter.

-Loves Harry
-Is stronger than Voldemort
-Dies is the 6th book.  

[Misty_wolf_of Alagaesia]

that would be Albus Dumbledore
-in love with Harry
-not in the same year as Harry
-Tornado's fan  

[Lune the Looney]

Cho Chang!

1.) A bit off.
2.) In Ravenclaw.
3.) Blonde  

[Flarityxx18]

Luna! xD

~Teacher
~Loved Lily Potter
~Has an "abnormally large nose" xD  

[Wolfy_Girl117]

Snape??

1. is obsessed with harry
2. takes a lot of photos
3. is a year younger then harry  

[o8Orobouros8o]

Colin Creevy

1)Likes to take pictures of Harry.
2)Is Two years below Harry.
3)Also obsessed with Harry.  

[Flarityxx18]

Dennis Creevy?

~Hufflepuff student
~Wore a "Potter Stinks" badge
~Accused Harry of being the Heir of Slytherin.  

[dory2o2]

~{ Ernie whatshisface }~

1) lives at Hogwarts
2) Is a menace
3) Was loved at the end of OotF ~{ and really the only time this character was loved for being a menace }~  

[Flarityxx18]

Uhh...Peeves?

~A teacher at Hogwarts
~A Head of House
~Rumored to be Snape's sister (I don't know if that's true, I just heard it online somewhere)  

[Matelia legwll]

As far as I'm aware, NO ONE is canon for Snape's sister, so I'll have to guess based mainly on your other clues.
Minerva McGonagall?
(If that's who you're referring to, yikes. Someone didn't do their math. She's in her late seventies, and Snape's in his early thirties. Honestly I think Irma Pince is related to Snape, but not as a sister, and she doesn't fit the clues since she's not actually a teacher, and certainly not a head of house.)

1) Muggle Studies Professor
2) Captured and tortured and killed by the Death Eaters and Voldemort.
3) Draco couldn't keep his eyes off of her as she hung in between tortures.