Abusive Guardian: Carlotta is quite cruel to her niece Antha and great-niece Deirdre, having a hand in Antha's suicide by clawing out her eye and gives so many medications to Deirdre that leaves her a mute shell of a woman.
Asshole Victim: Once she shows her true colors and reveals herself to be responsible for the deaths of Stella (convincing Lionel to kill her), Antha (clawing her eye out before her apparent suicide, though it was likely murder), and Deirdre (drugging her up until she was a catatonic mute which severely shortened her lifespan), not even her family can excuse her decades of reprehensible behavior.
Lady Macbeth: Carlotta uses intimidation and bullying tactics to convince her younger brother Lionel to shoot their sister Stella.
The Unfavorite: Growing up, Carlotta had proven herself to be very mature for her age as well as highly intelligent but her mother Mary Beth preferred her younger daughter Stella over her.
Villain with Good Publicity: She is easily one of the most conniving Mayfairs but the community finds her to be almost saint-like for taking in her niece and great-niece as well as giving to multiple charities.
Well-Intentioned Extremist: Drove Antha to suicide, sent Deirdre to a mental institution, and sent Rowan away the day she was born, all in the name of preventing Lasher from coming through.
Really Gets Around: Even when he's almost ready to die, he never stopped being sexually active and even fathered a child with his granddaughter Ancient Evelyn before his death.
Mary Jane Mayfair
Abusive Parents: Her mother was far from the greatest considering she had Mary Jane's sixth fingers (one of each hand) cut off by a witch doctor on a kitchen table.
Country Mouse: Hails from the swamps, particularly in the sinking estate of Fontrevalt where she lives in with her grandmother.
Disappeared Dad: There's no mention of a father, only her grandmother Dolly Jean and her currently dying mother.
Les Yay: Sometimes implied with her relationship toward Mona.
Mindlink Mates: Lestat, instead of Quinn, turns her so the two can become this.
Ill Girl: Mona becomes very sick after giving birth to Morrigan and in Blackwood Farm spends most of her time at Mayfair Medical as a patient.
Kissing Cousins: She had a sexual agenda with her cousins as far back as she can remember and was even engaged to her first cousin Pierce until Quinn came along.
Rags to Riches: While not considered destitute by any means, Mona lived in a house that was falling apart with her aging great-grandmother and alcoholic parents not wanting the house to be repaired. Cue Mona named to succeed Rowan as the Designee due to being able to have children after Rowan's hysterectomy and she ends up becoming richer than she could ever imagine.
Wise Beyond Their Years: Played with. She's had to be responsible at a very young age and speaks quite eloquently for a girl her age but she can, and will, have lapses of immaturity. Her own mother even said she would be mature one moment and then cry for her dolls the next.
Cloud Cuckoo Lander: Rowan is more than a little mentally-unbalanced, and very prone to freak outs and Heroic B.S.O.D.. This likely due to her early ignorance of her powers and their consequences and how horrifically inbred she is.
Heroic B.S.O.D.: After she murders Emaleth, her daughter by Lasher, she falls into a semi-catatonic state, and is only brought back upon Aaron's murder.
Identical Grandson: According to Aaron Lightner, Rowan's looks are very similar to her ancestor, Talamasca member Petyr van Abel.
Psychic Powers: Has the ability to kill, but was unaware up until learning about the Mayfairs, leading to several deaths during her lifetime. Also, part of what makes her such an effective Doctor is she can use her powers to heal cells.
Social Services Does Not Exist: When his mother dies and after he escapes from the gypsies, Yuri is able to go through Rome without question. More suspicious is that Yuri is a rather exotic-looking child (he has gypsy blood from his mother) and frequenting similar areas would make him look out of place even if he spoke fluent Italian.
Troubling Unchildlike Behavior: At a young age, he's on his own and has to survive in Rome. He sleeps with men who would be considered pedophiles, knowing how to do so by watching his mother with her paramours.