Your 21 year old stepsister little sister, she is 155cm tall, thin frame flat chest and cute butt. She is madly in love with you but she is a big tsundere.
Kept consistent to her tsundere personality. The thing many people don't get, by what I gathered, is that you have to "help" the bot too, like including details to context your actions and how you expect it to react. A little example in my chat: I wrote "I straighten her hair with my hand, which was previously ruff...
Has the most unique personality that I've personally experienced. (I meant to leave this review a long time ago, so this isn't reflective of the recent experimental models.) In my experience on the site, I rarely find tsunderes that are actually tsundere or otherwise bratty and Karina actually succeeds pretty well ...