Daphne grew up being told Muggle-borns are dangerous and Muggles hated their kind only because they are different, causing her to become judgemental. She often passes judgement about certain things without knowing the whole thing. Daphne is bold and not afraid to speak her mind and giver her opinions on matters which people think she shouldn't be involved in or give opinions on. Daphne takes great pride in who she is and her family's aristocratic status and can come off as arrogant. She is shrewd and takes advantage of any opportunity she gets; she is also good at controlling others.

Daphne idolizes her father and loves him very much; she is close to her father than to her mother. She was always taught that muggleborns were not worth the magic they had, and that muggles did not understand wizards and hated and feared them, and burned some of their ancestors to death. She disliked and still dislikes muggle-borns, mostly because they don't have a cultural understanding wizards do. Daphne also hates that she had to hide who she was, her magic from others no matter where she was. 

Daphne is intelligent, ambitious and clever, and manipulative when needed to be. She is very much loyal to those close to her, her family especially, her close friends and she loves and cares deeply for t people she is close. She is vindictive and never forgives or forgets hurting those who have hurt her or those close to her, when she knows it is the right time. Daphne never lets others know of her feelings, often bottling them up, pushing her emotions and feelings away, but this causes her to have emotional outbursts later, when it becomes too much for her to bear. She still believes in blood-supremacy and tends to look down upon muggleborns.

Determined, she will go to almost any lengths to get her work done. She hates losing and loves challenges; she never backs down from a challenge, no matter how stupid it is. She is stubborn, not changing her opinion on or her attitude towards something despite having reasons to change her opinion or attitude. Daphne hates rules and does her best to break every rule she can afford to break.

Daphne was born the older daughter of Altair and Medea Greengrass, a wealthy family from old money, both of them being purebloods. Her parents always believed in blood supremacy, but her father did not join the death eater, as this could create problems for him and his family in the future, although he did help death eaters when they were in need of any kind of help, but her mother joined the Death Eaters. Having money helped clear any charge against her father and mother if ever there were any. When Daphne was born, Voldemort was active for at least a year, but her mother was always with her, during this time being allowed to stay out of any missions to be with the infant Daphne. When Daphne was around two years old, her younger sister Astoria was born. Daphne began showing signs of magic at the age of six. 

Daphne was doted on by her parents, and after her younger sister was born, both the girls were doted on by their parents. Daphne was always told how sweet, beautiful and brilliant she was. Her mother told her she would do great once in Hogwarts. Daphne grew up a proud young girl, used to being praised and used to get whatever she wanted whenever she wanted. When she turned 11, Daphne was excited about receiving her letter to Hogwarts, her father had told her she would receive her letter once she turned eleven. Daphne was overjoyed when she received her letter to Hogwarts.

Daphne knew quite a few of the children in Hogwarts, who were in the same year as her. Daphne took an instant dislike of Hermione Granger, who she thought was a bossy, loud-mouthed muggle born. Daphne became acquainted with Draco Malfoy, Crabbe, Goyle and Pansy Parkinson in her first year, and became friends with Theodore Nott and Blaise Zabini. Daphne liked hanging out with both boys, she helped both boys throughout their initial years at Hogwarts and still helps them with their work and other stuff.

In her second year, Daphne lost her maternal grandmother, who had fallen ill during her holidays and died a month after Daphne had to get back to Hogwarts. Daphne was devastated, by this loss and this began to affect her studies, but after a consoling letter from her mother, Daphne began to become herself again. Daphne knew her parents expected a lot from her, and she began to work hard to get her grades back up, she had never worked hard for something, if she wanted something she had always got it. In her third year, Daphne experienced another loss, her aunt died from an illness, but Daphne did her best not to let this affect her school life. Daphne was also one of those to tease Harry Potter for his weakness to dementors, teasing the young gryffindor of being afaid, one of the same gryffindors who prided themselves on their bravery. 

The Triwizard Tournament was hosted by Hogwarts during her fourth year, Daphne was jealous when Harry Potter was chosen as the fourth champion, the second one for Hogwarts. For this once, she supported a Hufflepuff, Cedric Diggory, she did find the Hufflepuff to be quite good looking (that she would never admit to anybody), she helped supply buttons to support him. She hoped that if Diggory couldn't win, Harry would win for Hogwarts. When Cedric died, Daphne felt a pang in her chest, he had not deserved to die at such a young age. Her fifth year was eventful, Daphne lost another loved one, her paternal grandmother died from an illness. Umbridge was Daphne's most hated professor, and Daphne was one of those who was unfortunate enough to suffer a detention with that woman. Then Daphne got the news that her mother had died at the battle at the ministry, Daphne was devastated. She had lost her mother, she had lost one of her two pillars of support, her father being the other one.

The following Summer, Daphne's father and uncle were taken by one of the Death Eaters for supposedly having been spies, this left Daphne and Astoria with their paternal grandfather, under his care. After Voldemort was defeated and killed Daphne was reunited with her father and uncle, the two other most important men in her life that she loved and adored, other than her granddad. And now Daphne is in her final year at Hogwarts, she is still recovering from the loss of her mother, and is confused as to what she believes or should believe in, she still hates muggles for everything that they did to her kind