This is Ted, he's nice and friendly to everyone except for Rodolphus because he's a loathsome person. He's from timeline so he won't know everything he could about Dora's future, but he's been in the village for a few weeks, so he at least has an idea of how this place works. Disappointed as he's going to be that he missed so much. He'll also be excited to meet Victoire because he heard about her relationship with Teddy already. Also, I don't like this PB yet, so we shall see if I get used to it or find a new one.
Fred is Fred and will therefore be thrilled to see Tonks (he has no idea she's dead too). He's also quite likely to befriend Duke and maybe Doc? But definitely not Rodolphus. He'll be chuffed to meet Victoire. He's from timeline.
James is going to be friends with everyone except Rodolphus, but is likely to taunt him. Does that count? He's from FA!
Hermione is 26 and a brand new mom to a 3 or 4 month old baby Rose! She's what you'd probably expect from Hermione Granger (who kept her name, thanks). She is going to be SO GLAD TO SEE TONKS AGAIN!!!! And baby Victoire! Who is not a baby! What! She will not be pleased to see Rodolphus. She might not fangirl Duke, but she definitely knows who he is. She does not know Doc. Regardless, she sticks her nose in everyone's business, so it should be easy to get her to interact with people.
Finally, Zach is from another game I used to play at, called 54. He's 31 and editor of the Daily Prophet, but only because his daddy owns it. He knows who Kirley is, but that's really it. He probably knows that Victoire exists and remembers the pink-haired joke-of-an-Auror from seeing her around the school in his sixth year, but that's about it. He also sticks his nose in everyone's business but not generally in the same way. He's an asshole.