Name: Hermione Jean Granger
Pronounced: "her-MY-oh-nee"
Hair: Bushy Brown/Blonde
Eyes: Brown
DOB: 19th September1979
Height: Medium
Build: Slim
Blood: Muggle-Born
Enrolled at Hogwarts: 1991
Wand: vine wood with a dragon heartstring core. Her wand's wood, vine, is the wood ascribed to her birth month in the Celtic calendar.
Crush?: Has fancied Ronald for quite some time, but they bicker with each other to hide their feelings.
House: Gryffindor
Background:
Hermione Granger is a Muggle-born witch, that is, the child of two parents, none with magical powers. Her parents, both dentists, are "a bit bemused by their odd daughter, but quite proud of her all the same". Hermione is an only child.
She seems to know a great deal about magic, Hogwarts, and the wizarding world. How she first realised her magical abilities and first encountered other wizards has not been revealed beyond an off-hand remark Hermione makes about being "ever so surprised" when she was invited to enroll at Hogwarts.
Personality:
Hermione's position as one of the most intelligent students in her year, which she works hard to maintain, has also led to frequent teasing, although Harry and Ron do depend on her for academic help, and her knowledge and common sense prove valuable in overcoming the trio's challenges. Hermione's logical abilities manifest themselves in her playing Devil's Advocate during discussions between herself, Harry and Ron, often pointing out aspects that the boys will ignore, usually for emotional reasons; when Harry is angry about Rita Skeeter eavesdropping on Hagrid and Madame Maxime at the Yule Ball, Hermione points out that he and Ron were doing the same thing.
Hermione is brave and loyal and has a fierce political conscience; Though in her first year she was confused at crisis situations (when asked to light a fire when trapped in the Devil's Snare, she said "But there's no wood!", later she became the one to solve those situations (manages to fool Umbridge into the Forbidden Forest, marking the doors at the Department of Mysteries).
Although compassionate, she can be a bit awkward when dealing with people, despite her position as the "social soother" in the trio. A good example is her ham-handed attempt to comfort Lavender Brown over the death of her rabbit. Screenwriter Steve Kloves has said that Hermione often shows "a complete lack of understanding of how she affects people". Hermione is deeply insecure and sometimes feels utterly inadequate. To compensate, she tries to be the best at everything at school, projecting a false confidence that can irritate people. Hermione also tends to irritate people with her apparent sense of moral superiority, which she has tried to force upon others in the past. Despite this she has also been proven to be very adept at understanding emotion and relationships, which often puts her at odds with Ron who is initially completely oblivious when it comes to such matters. Harry has consulted Hermione for advice regarding his relationships with Cho Chang and Ginny Weasley.
(main source - wikipedia)