Alpha kids:

Jane: Rich, aristocratic Fontainian who's a 5-star Hydro Sword user. Her family owns one of the largest bakeries in all of Teyvat, who sell pastries worldwide. Her family is also a part of the Marechausse Hunters and was responsible for locking up the Doomsday cult that predicted the second Cataclysm. She is proud of this fact, and her family had enough money to intentionally change the story of events to make the Doomsday cult look really bad and to further hide the secret about the second Cataclysm's arrival.

Roxy: Natlanese Pyro 5 Star Polearm from the Children of the Springs tribe, she not only works at the hotsprings and resort, but is a "matchmaker" who charges tourists coming into Natlan for a chance to find their perfect match or whatever lol, but I imagine she's actually pretty bad at it. Idk what her ancient name would be at all, unfortunately </3

Jake: 5 Star Geo from Mondstadt who uses a "bow" but is a sharpshooter like Chevreuse or Clorinde. He's a part of Varka's expedition crew and was allowed to separate from them for a bit to go and explore on his own. He's an adventurer and does odd jobs here and there. I imagine he's famous for doing incredibly dangerous quests for people like The Traveler is, so a lot of people know about him and speak about him like he's some super awesome hero of legend. In actuality he's just A Guy.

Dirk: 5 Star Descender, like Skirk, who came from another world entirely. He's a sword user. Nobody knows he is a Descender, obviously, and he intends to keep it that way. He disguises all of his strange, weird-looking attacks as Pyro, but it still does weird things to other enemies. (I haven't decided if this will just straight up be Ult Dirk goofing off and jumping to this other reality for kicks or not lol, but it's a start)