One mistake that people have made is referring to one single pony as Friesden. Truthfully, there was never one Friesden. When she was born, she was not Friesden alone. She had a partner in her mind, the daemon that came to be known as Schmoe.
Where other children had childhoods, she was forced into the back of her mind while the daemon controlled her body to obey her father's will. It was there that she learned her special talent...creation. She created a place to make believe her life. She cut herself off from her body and fled to her own realm, where no-one else could get to. She made up her mother, her friends, everyone.
Until one day her father decided to bind the 'new' daemon into her mother. With Schmoe forced out temporarily, she was placed back in the pilot's seat. She remembered all that had happened to her. All the...uses, shall we say, she was put to. She had a knife. She charged her father, trying to kill him. Before she could, he forced her mother into the way. She killed her without hesitation. It was not her mother. Her father hid in a room, barricading the door, and called for the guard.
The guard came in, knocked out Friesden, and rescued the father. In their investigation, they discovered all the sordid details. Friesden was put into a combined daemon and mental facility, and her father was exiled, had his horn amputated, and was castrated. Afterwards, the records were burnt, and any surviving details were kept top secret.
Friesden had imprisoned the daemon herselves at this point. The concept of empathy, of compassion, of mercy, of love; these were as foreign to her as heat is to ice. She grew worse. Eventually, having decided she would leave this place and kill all who stood in her way, she released the daemon, who unbound a number of other daemonhosts. The combined destruction and chaos led to the deaths of everypony there, save for one prodigy alicorn.
The remaining years she spent on the street, killing everypony who did not bow to her will. She became fascinated with how ponies worked, and constructed another self to simply learn and apply that. Another she kept to 'mother' her, in a cruel parody of love mixed with lust. She cut herself off from her innocence. It was then that she learned of Glitterglen. A fresh place, where the heat would be less. She travelled there. The rest is, as they say, history.