History Katherine is one of a set of twins born to Elena and Clay Danvers. From the moment she was born, she's been shown nothing but love and protection by both her parents and the Pack. The fact that she was Clay and Elena's daughter ensured that she'd always have a place in Pack, even if she had the chance of not inheriting the being a werewolf.
She had a fairly normal childhood of playing with kids her age, going to school, climbing trees, harassing her brother, being doted on by extended family (a.k.a. Pack). Except for the protection. She grew up with more protection that the secret service could offer, at least one Pack member always just behind her to keep her safe. Part of it was because she was the Alpha's grand-daughter, she knew this because Logan also got watched carefully. But she wasn't just watched carefully, she was watched like a hawk because she is the only daughter born to a werewolf. They never knew what mutt might think she'd make good leverage against the Pack because of what she is.
As she grew, there was a growing anticipation on whether she'd shift or not. She'd always carried the scent of werewolf on her, but that's never a sure indication. After all, her parents are both werewolves, so inheriting a carrier gene and not shifting was a possibility. And, come puberty and the right time, to the surprise of some and the knowing knowledge of people like her parents and Jeramey, she shifted into a snow colored wolf.
It marked the end of her normal life and the start of her life as a true Pack member. She still went to school, but she had to be more careful of things now. She couldn't continue on the soccer team she'd joined, partly because of unfair advantage but mostly because she didn't want to accidentally hurt someone when she was too into the game and not being careful. She did however, not let it affect her relationships with her friends as much as she could. She couldn't hang out with them as much as before and trips out of town were strictly off limits, but they still went to movies, shopped, and generally hung out.
There was one exception through all of this though, as far as not really getting close to the girls she hung around with. Because her mother, Elena is a good friend of Paige Winterbourne-Cortez, Katherine grew up being very close to Ruthie, Paige's daughter. Aside from Logan, it was nice having another girl her age around who she didn't have to hide her family from.
Katherine graduated from High School with a high B average. She is now at college for a teaching degree, with a specialization in English.
Personality Katherine is a fairly fun loving, outgoing girl. You can't not be when you're around Pack so much. She's very close to her family, her Pack, and to Ruthie, as they are all important to her. Katherine has also inherited her mother's willingness to trust outsiders, though going to a regular school helped too. And while she'd pick talking to a supernatural over a human, it's more to do with the fact that she wouldn't have to hide her real self from the other supernatural person.
Katherine does have a slightly rebellious streak, having been kept under lock and key all her life. Getting into trouble, disappearing when she's supposed to be somewhere, and other shenanigans, she's gotten into it all. At least in her mind. She's also taken her mother's habit of, if someone close to her pisses her off enough she takes off. She's always been back by morning the next day, though, after she's blown off some steam.