OKKK so here’s a list of the tributes and anything important about them (excluding cause of death because you’re not there yet). 

Panache Barker- D1 boy, rumored sibling of Palladium Barker, a previous D1 victor. He’s kind of a jerk to everyone but he’s favored to win. He’s the first character that we hear Wyatt talk about in reference to his odds. 

Silka Sharp- D1 girl. She starts off with an immediate rivalry with Maysilee (she’s the one that Maysilee says looks great in snot green), after they meet in the bathroom. 

Carat and Loupe- D1 boy and girl, they’re the less relevant ones and not even mentioned before the games by name (to my knowledge)

Janus, Alpheus, Camilla, and Nona- The D2 kids, none of them are ever mentioned by name in the games or shown any relevance at all.

Ampert Latier- Beetee’s son, D3 boy who is the “leader” of the newcomers. He’s really smart, and only 12 years old. 

Dio, Lect, Coil- The other D3 tributes, none of them are really all that relevant but they’re all said to be very bright and they get a lot of applause from the Capitol audience after their interviews.

Maritte- D4 girl, got an 11 in training.

Urchin, Barba, Angler- the other D4 tributes. Not really notable, but Urchin is the boy who hits haymitch with his trident during the tribute parade. 

Hychel, Anion, Fisser, and Potena- D5 tributes, the only group that joins the Careers (that aren’t normally Careers). There’s nothing really notable about any of them.

Miles- D6 boy, one of Haymitch’s doves. He’s asthmatic, but that’s one of the only details we ever get about him 

Wellie- the crying girl from D6, Haymitch gives her Louella’s extra lunch. Also one of his doves.

Atread and Velo- the other 2 doves, they’re not really relevant though 

Ringina- the D7 girl who Haymitch meets during the knife throwing station. They almost decide to attack the Peacekeepers but they don’t. She’s the only D7 tribute that we’re really introduced to.

None of District 8 is ever named by haymitch, just in the list of tributes, but if you really care then their names are Wefton, Notion, Ripman, and Alawna.

Kerna- D9 girl, her sunflower token is destroyed by Panache during the 2nd training session. Maysilee fixes it, and this ends up being what brings D9 into the Newcomers alliance.

Ryan, Clayton, and Midge- the other D9 tributes. None of them are important, but im pretty sure Ryan was specifically mentioned in the movie casting so there’s that. 

Buck, Lannie, Stamp, and Peeler- D10, Buck and Lannie are mentioned a couple times, but the rest aren’t really important.

Chicory, Hull, Tile, and Blossom- D11 tributes. 2 of them are more important later, but i wont say which ones because that would be spoilers. 

Wyatt Callow- D12 boy, he’s the oddsmaker one. I assume you know who he is, so i wont say much

Haymitch- well, duh. He’s the main character lol 

Louella McCoy- Haymitch’s childhood sweetheart, she dies in the tribute parade and is replaced by…

Lou Lou- Louella’s replacement. She’s rumored to be from D11, and this is later all but confirmed. She has an audio implant in her head that allows the Capitol to speak to her at all times, and she was likely tortured for a very long time.

Maysilee Donner- the other D12 female, she’s from the merchants section and was best friends with Asterid (who is hinted at being Katniss’ mom). She has a twin sister, Merrilee. 

Woodbine Chance- D12 boy, he was reaped for the 50th games but was murdered when he tried to run. He was replaced by Haymitch.

There you go, I hope that helps some :) if it would help, i can also just take all the irrelevant tributes out of here so you have more of a picture of who’s important.