Hello, hello!
Okay, I'll take it from the top haha
For
Christian Anthony Ward I think that just acquaintances would work? Because Vika works well with others, mostly, but he's a snarky little shit and would probably make some inappropriate jokes every time he called him Little Dolohov. He'd like to point out that he's taller than his father, excuse everyone.
Dorian Michael Humbert would most likely not have any problems with him. While he absolutely has issues with authority he hasn't willingly recognised, he also knows that he has to keep his position at the Ministry as favourable as possible. So yeah, he'd need breathing exercises sometimes, but in Dorian's sight he'd be very good.
Yes for
Rodolphus Achille Lestrange' pranks, though Vika being as vengeful as he is, he would probably have gotten back at him somehow. Maybe not some elaborate prank but he always takes some advantage of being so much younger and his dad being protective. Now, though, he's a fan of billiards and poker, so they would probably hang out if Rod can stand his often incessant chattering. (As for sleeping with Sera... she's... well, she says maybe at some point. It's more than most people get from her?)
Lyra Ophelia Nott, I can definitely see them talking a mile a minute together and then falling into bed. He likes loud people and those who know how to have fun, so he wouldn't have been opposed to staying in touch after school even if it's just as friends by now.
Narcissa Astrid Malfoy seems to us more the acquaintance type of deal. He's polite to all the people at these functions, usually. Unless it's a private conversation with someone he knows better, then he gives in to his urge to be a shit. But Cissa would be safe from that lmao.
Vika says that
Christine Aine Sayre would have been a bit young for him back then, especially because his pranks were rarely actually harmless. However, if they have the same circles then they would definitely have interacted a few times? Enough for him to remember who she is, maybe. Same goes for
Elara Sayre; since she's so much younger, it would be a sort of second or third hand acquaintanceship?
Andromeda Caecilia Tonks would probably be better off not running into Vika. He tends to be carried away with things and he definitely has no positive feelings for blood traitors.
Nicholas Evander Malfoy and
Julian Taranis Faust are probably passing acquaintances, from the same circles but not actually close or friends. That makes
Belle Deveraux someone he probably doesn't even remember. (But I definitely may bring over my own werewolf who'd be a perfect fit for her pack)
Derek Auberon Burke probably goes on the same list of acquaintances as Christian, but with the added bonus of being someone Vika constantly hits on even if he knows it won't be appreciated. He's just... insufferable like that. Not on missions, though, then he's mostly well behaved.
For
Diana Marie Ward... well, she's pureblood, even if they're neutral. I suppose that they'll have crossed paths at some point, but more than that seems unlikely to me.
Lastly,
Lex Camilla Eiriksen seems like a whole lot of fun to Vika. He definitely flirts, even if it's harmless and not
really meant. She's an older auror so they'd definitely know each other at least.