Anastasia's Relationships

Theodore Nott:
Theodore, knowing that Anastasia wasn't his biological daughter, accepted her as his own to protect the Nott family name. His sister Tatiana had almost ruined it when she fell pregnant with a muggle he couldn't allow his wife's adultery dent their family crest. However although Theodore claimed to accept Anastasia as his own daughter he never really did. He would always favour Alexander and Allyson. Ask what they wanted, give them whatever they asked for, teach them how to fly, help them read and write. This was something he never found the time to do with Ana and so she felt forgotten and pushed aside. Irregardless of the way her Father ignored her Ana still fought hard for his approval. All she wants is do him proud and prove his worth.
At Hogwarts Ana writes to her parents, she even writes Theodore private letters but never receives a reply. It's always her Mother who replies and when she does respond Pansy writes 'on behalf of both of them' meaning just herself.  

Pansy Parkinson-Nott
Pansy noticed that Theodore didn't love Anastasia how he promised but there was simply nothing that she could do. It did hurt to see her child saddened at times but the witch simply ignored this, blaming herself for her daughters sadness. In spite of that she did make sure whenever she did something with the children that Ana was included just as equally as Alexander and Allyson. It is perhaps because of this that Anastasia loves her Mother and is closer to her. Not that this means much for it is still her Father who she wants love from.
Since being sorted into Gryffindor Anastasia is rarely mentioned to anyone outside of the family from even her Mother. Of course Pansy will gladly bring Alexander up in conversation, her favourite child, and even Allyson too.

Alexander & Allyson Nott
Anastasia once was close to her siblings but when they both went off to Hogwarts she was the only child in the house. Just her, the Nanny and a house elf. The day she received her Hogwarts letter Anastasia thought it would be the rebirth of their relationship but was wrong. For starters she was sorted into Gryffindor but despite that Ana realised that even Allyson and Alexander weren't as close as they used to be. Perhaps that was part of growing up? The first year she appeared the annoying younger sister, begging for their attention, wanting to show off the spells she learned. Neither of them cared - Alexander cared the least. The day she was sorted into Gryffindor was the day that her brother tried to not associate himself with her. He was becoming like their Father. Why? Because he didn't want his pure blooded Slytherin friends to think anything less of him.