Check out these quotes I've taken from a short and simple Google search that shows how many Mary Sues claim veelas as part of their lineage in order to boost their slut appeal:
"Lia looks every bit the part veela that she is."
"Sometimes, she loved being part Veela, it was always amuzing to see guys reactions as you walked past."
"It was part of the package of being a Veela the heritage that was hers."
"As a result of this, she is part veela, part witch, and is considered a half-blood to the pure-blooded folk."
"Draco Malfoy is a part Veela who has just come into his Veela Inheritance to discover that his mate is none other than Harry Potter."
"Despite how loving and happy her home was, Kiss always struggled with the attention being part veela got her."
"Being part veela, people's eyes sometimes tended to wander towards her anyway."
"Alegra decided that since the item was usually something students didn't acquire she walked to the counter but manipulated her movements ever so slightly with the attraction harnessed by the Veela blood inherited from her grandmother."
"How could I have never told her that I was part Veela?"
"Draco is part Veela and goes into heat, one thing leads to another, now Draco is pregnant. When his father banishes him for not giving up the child, Draco has nowhere to go but to Professor Snape. Will Ron ever find out hes the father?"
"Looks: tall-ish, wavy blond hair, silver blue eyes, and an athletic body type. She is part Veela."
"The moment that his fingers left it and he realized that it had not yet gone off in a fiery blaze in his face, an enormous breath of relief whooshed out of the part-veela’s mouth."
"Arabelle is known througout Hogwarts to be one of the most attractive girls there mostly because shes part veela."
"She is remembered there for her beauty and being the first person with more than 1/16th veela blood to have attended since the 1800s. (She is 1/8th veela.)"
"Irish,Italian,French,American, she also has a bit of veela in her."
"but many people are blinded by her beauty (not being bigheaded - she's an 8th veela)"
"Special Talents: Genevieve has part Veela in her (her mothers side) so she can easily charm boys."
"Her mother, Alexxia, was half-Veela, her father an Auror."
"Family: Mum-Maire Ash, dad-Jackson Ash. Marie is half veela [which makes Jessica part veela also]."
"That's what anyone would notice when first gazing upon the girl. Then they would notice that she's pretty. Whether she likes it or not, she got her looks from her Grandmother, who was a veela."
"In March of 1989, Kensie James was born into an already large family. In addition to her father, a muggleborn Englishman, her mother, a half veela, half pure Scottish woman, she had eight siblings, all of which were always willing to give her a piggyback ride or let her talk their ear off about the most obscure of things."
"Bio: Left on the doorstep of her adoptive parents as a baby, no one really knows where she comes from. All is known about Rye's origin is that she is part Veela and the daughter of the murderer, Sirius Black."
"Turns out, somewhere back, veela blood got into their blood, making them part veela."
"You're the perfect girl, I don't care if you're part veela, all I see is you, and no one else."
"Lena narrowed her eyes at Victoire's last comment. 'I know how hard it is, Victoire; I've felt it. It's called sexual tension. The fact that you're part Veela makes no difference in that whatsoever.'"
"History: Transfered from the great french school of beauxbatons in her 3rd year. She speaks french/english and is part veela."
"He stares at her a moment dazed by her veela-ness."
"Looks: Delia is part Veela, but very modest about it."
"'What? No, I think you have angelic eyes—'
'That of a maiden veela,' added George gallantly."
"Her mother is part veela so Natalie gets the prettiness from her."
"Notable Qualities: One of the top Ravenclaws at Hogwarts, one of the most poised students at Hogwarts, Part veela,Raised in a Slytherin family, racist against Mudbloods, duh."
WAIT FOR IT.....
"Maria is a Vampire, plus she is part Veela. When Maria was a little girl, her parents died in front of her. She was then taken away and was bitten by a vampire and was forced to be one."
SON OF A BITCH!!!! Vampires killed her veela parents??? They are such assholes! Now she's a vampire veela witch. She's just more amazingly awesome than someone who is awesomely amazing.
'Veela-ness' is like an STD. Expect characters with this trait to mention it all the time, flirt with every male character in the rpg and be angry at the female characters in the rpg who aren't jealous of the part veela's beauty. Overall, any character who is part veela is usually just a one trick whore.