I have no idea who you are and have never met you before in my entire life, you complete stranger!
Anywho, You should know this lovely bloke here, George Weasley. He would have been one year behind Shiv, so they might know each other. I'm sure she at least is familiar with his pranks during and after school!
Next, Hermione, who was two years behind, but would probably get along with her based on her profile. If you're interested in backstory there I'm more than happy :)
Then I have Astoria Greengrass. She's way more pleasant than her family, but I'm not sure if they would have known each other, since they are a number of years apart in school. But if you've got ideas, I'm all ears!
Last, is Fenrir, and I think we've heavily plotted that, so we should be good there hahaha!