You might be surprised to learn that someone who's literally half-veela has such a gritty dream - to become the next Bear Grylls - but the element of shock, and surprise, is something Ainslie Morgan actually rather enjoys holding over people's heads. It's an advantage, a slight one, but an advantage all the same, and Ainslie's always been one to hold her cards close to her chest. There's a burning ambition to make something of herself, like her aunt has always said she should, as well as an equally fervent need to uncover the real truth about things. That might be her conspiracy theorist persona speaking there - if there's a conspiracy about it, she probably has already read into it and is in the process of doing her own, personal, investigation. (She has a cousin who's a detective. They're acquainted, and one of her best friends is an info broker. Connections. Ainslie likes to know useful people.)
She's a decent gambler, she can play darts, and can lie through her teeth smiling to your face. (Her poker face and lying ability is the best thing she ever learned from her uncle, much to her aunt's dismay.) But her most striking ability is those leaned toward survival, even those that could be much more easily accomplished with magic. She wants to be Bear Grylls, really she does, with that survival-of-the-fittest temperament (she makes friends, but she'll always put herself first, the inner cynic) and she's not too keen on the magic part. She's probably the only witch who hates it. Everyone (mostly) knows she has a case of schadenfreude, so if she's laughing at your pain, it's not just you. She's like that to everyone. (She laughs at her own too, and there's plenty of that to laugh at.)
She cheats at Wizard's Chess, and Gobstones, and every other game under the sun, and gets away with it most of the time. Placing the blame on others is something she has a talent for, if she says the right words and sets the pieces up. (The cousins she lives with have learnt this fast. Her aunt thinks that the nature child is an actual angel insistent on living in a treehouse in her back garden. The cousins know better.)
Don't get her wrong, she's not the usual Slytherin type - she's breezy, sociable, friendly. It's the ambition that fuels every action she makes that might place her in the house of the serpents. However, she's always very aware of her surroundings, and she's more of a realist than a fantasist, and she's aware of other people and their intentions. She'll never sell out your secrets though, not unless you really make her feel wronged and hurt. Ainslie operates in what you might call a kind of 'organised chaos' - it's a mess, really, but she knows where everything is and that's all that matters.
She's got an almost unsettling lack of stress in situations that would be expected to induce it (she's been trying to survive in the wild since she was a kid) and she does a lot of things that could be considered dangerous out of pure curiosity, or because she feels it would likely end in something beneficial to her. Ainslie, unfortunately, has to be right, and winning matters more than protecting people's feelings. There's an overwhelming need to get out of here, because she gets bored of things, and people, on occasion. The same old place can just grow tiring. She is an ESTP.