As Harry's aunt and uncle, the Dursleys, were Muggles (The non-magical people), and they had no understanding of magic, and even though his aunt and uncle knew about his lineage, they wanted absolutely nothing to do with it ( Since Petunia was the sister of Lily they considered Magic as Un-Dursleyish) . The Dursleys proudly considered themselves a "normal" family and despised anything out of the ordinary. They lied to Harry about his parents' death, claiming they had died in a car crash. They also claimed that the lightning-bolt scar on Harry's forehead (which he had received from Voldemort's failed Killing Curse, and could vaguely recall as if he 'strained his memory' a green flash of light and a high, cold, laugh.) was from the same car crash his parents died in.He tried to understand what it was, or if it was from the car crash, but he simply could not. Petunia and Vernon forbade Harry from asking questions, particularly those regarding his parents. In addition, the Dursleys refused to have pictures of Lily and James, and did their best to avoid the subject of Harry's parents altogether.
They resented Harry for his magic, which was sporadic, but evident and strongly discouraged any sort of imagination. They neglected Harry, verbally and emotionally abused him, and inflicted cruel punishments like depriving him of meals and locking him into the cupboard under the stairs on him whenever something "unusual" occurred. Their behavior was left unreported to authorities. In his youth, Harry could make strange things happen without understanding why he could, as no one had told him that he was a wizard. For instance, after Petunia had sheared off all of his messy hair using a pair of kitchen scissors in her fury that it would not lay flat, leaving him almost completely bald with only the fringe at the front, it had grown all the way back, and to its previous messy state at that, by the next morning. Harry was punished, even though he had not done anything on purpose. Another time,Dedalus Diggle bowed to him in a shop, and Petunia furiously interrogated Harry as to know how he knew the man before leaving the shop hastily.
The Dursleys spoiled and pampered their son Dudley and paid almost no attention to Harry; indeed, what little attention they did pay to him was negative in its entirety. All his clothes were hand-me-downs from Dudley and were far too large for Harry. He was made to sleep in the cupboard under the stairs, while his cousin got two bedrooms to himself (one for sleeping in and one for storing all his toys). They also made Harry do household chores for them, such as making food and getting the post. In time, Dudley started bullying Harry. The Dursleys took Dudley and Piers Polkiss to someplace spectacular every year for his birthday, but the only thing Harry ever got for his birthday was one of Vernon's old socks or a coat hanger.
The Dursleys always hid evidence of Harry's existence by not having pictures of him in the house. Among the few people who did know about Harry were Petunia's friend Yvonne and Vernon's sister Marge (who showed up in prisoner of Askaban and was blown up by Harry) , the latter of whom the boy was forced to consider an aunt to him despite not being a relative of his. Aunt Marge showed the most dislike for the frail boy while visiting Privet Drive during Dudley Dursley's fifth birthday, when she whacked Harry around the shins to stop him from beating Dudley at musical statues, and on holidays like Christmas, when she brought a computerized robot for Dudley and a box of dog biscuits for Harry.She eventually made a fool out of the young Potter during Dudley's tenth birthday, when Harry accidentally stepped on the paw of her favorite pet bulldog Ripper, causing the enraged dog to chase him out into the garden and up a tree. Dudley laughed himself silly at the sight of his cousin then, and to the Dursleys' delight, Marge refused to call Ripper off until past midnight
Unknown to Harry, one of his neighbours, Arabella Figg, was a Squib ( A person whose parents are wizards but the child is not. Other example of a squib is Albus Dumbledore's sister Ariana) . Unfortunately for Harry, to maintain favour with the Dursleys, she was forced by Albus Dumbledore to give him a lousy time whenever she had to look after him, as the Dursleys would never have let him go if they knew Harry was enjoying himself, a possibility that infuriated them. Harry discovered her connection to the wizarding world when it was revealed during the summer before his fifth year that she worked undercover for the Order of the Phoenix to keep tabs on Harry's suffering.
This is Arabella Figg.
Next to be continued!