General Information:

First Name: Tom or Lord
Last Name: Riddle or Voldemort
Heritage: Half Blood
Nationality: British
Spoken Languages: English, Parseltongue
Place of Birth: London
Age/Date of Birth: December 31, 1926
Approved Special Features: Parseltongue, Legilimens

Looks:

Eyes: Red Slits
Hair: None
Height: Tall
General Appearance: Pale, Sallow and Gaunt. Like a skeleton. He has a flat nose with slits for nostrils very similar to a snake's. In fact, he has an all-over snakelike appearance. His fingers are unnaturally long.
Dressing Style: Black robes.

Personality:

General Character Traits: Cruel, Judgemental, Selfish, Cold, Aloof, Proud, Bitter, Obsessed with Power, Murderous, Evil.
Likes: Snakes, Death, Purebloods, Slytherins, Power, Dark Arts, Parseltongue and Cruelty.
Dislikes: Harry Potter, Dumbledore, Muggles, Mudbloods, Gryffindors, Good, Order of the Phoenix, Weaklings, Light, and Dumbledore's Army.
Habits: Killing, Death Eater Meetings, Obsessing over Harry Potter, Judging, Cruelty and Parseltongue.
Strengths: Power, Dark Magic, Age, Ambition and Talent.
Weaknesses: Hate, Obsession, Mis-Judgement and Having to Rely on his Followers.

Personal History:

Parents: Merope Gaunt (descendent of Salazar Slytherin) and Tom Riddle (muggle)
Siblings: None.
Background Story: Growing up as an orphan he developed a hate and resentment for muggles after his father left his dying mother because she was a witch. He went to Hogwarts and progressed through the ranks to Headboy as a Slytherin. We wanted all witches or Wizards to be Purebloods and he hated Mudbloods. He became obsessed with power and during an attempt to kill Lily and James Potter after they were betrayed by Wormtail, was unable to kill their infant son after killing them. His power was drained after trying and he went into a half-existence until Professor Quirrel brought him back in the dungeons of Hogwarts. He has been through many trials with the trio and is still determined to kill Harry. He is gaining power and has followers everywhere. He will rise even higher....

From Hp Lexicon:
1926-1938, Raised in a Muggle orphanage in London (CS13; GF33, HBP13). Orphanage was clean, but meager: a bare courtyard and grim, square building surrounded by high railings (HBP13). Head matron was Mrs. Cole. Mrs. Cole recalls that he was an odd baby -- he rarely cried, and as he got older he appeared to cause "nasty" things to happen to the other children and to pets around the orphanage. Also stole things: a yo-yo, a silver thimble, and a harmonica ('mouth organ').

At Hogwarts, Tom was obsessed with his heritage. Although he knew since his first year that he was the Heir of Slytherin, he didn't learn the complete story until he tracked down and visited his uncle, Morfin Gaunt during the summer of 1943. Morfin told him that his father was a Muggle and his mother was a descendent of Slytherin. At this point, Tom Stunned Morfin and went to Riddle House where he murdered his father and grandparents. Before leaving Little Hangleton, Tom went back to the Gaunt shack and stole the gold Slytherin ring. It is unknown how, but Tom also bespelled Morfin into confessing to the crime. Morfin was convicted for the murders and sentenced to Azkaban.

After leaving Hogwarts in 1945, Riddle began working at Borgin and Burkes on Knockturn Alley. His job was to ferret out items of value and obtain them at the lowest price possible. He suddenly left this job and disappeared after he killed Hepzibah Smith for a gold locket that belonged to Slytherin and a gold cup that belonged to Helga Hufflepuff.

http://hp-lexicon.org/wizards/voldemort-narrative.html

http://hp-lexicon.org/timelines/timeline_voldemort.html




Other Details:

Pets: Snake Nagini.
Wand: yew wood, 13 ˝" long, core consists of one of Fawkes’ (phoenix) feathers.
Quidditch position:
Anything else? Pure Evil, and antagonist of entire series.