Warning: I'm not a master at the 7 deadly sins soooo i'm pretty much just doing this for fun so feel free to put your thoughts in the comments.

Karasuno
Daichi: Wrath (Dadchi-)

Yamaguchi: Envy

Kageyama/Hinata: Greed

Tsukishima: Sloth

I seriously have no idea who-: Gluttony (Gluttony dosen't only apply to food, right? It also applies to abuse of power, too much gadgets, gifts and etc., dosen't it? Even if it does i still dont know sooo.)

Asahi: Pride (Tbh he is half half but i live for the noya and asahi fight scene.
I know... i'm biased as a person could be but this is my book sooooo :D)

Outside Karasuno
Wrath: Yaku (Demon Senpai-)

Envy: Semi (I think, it was supposed to be Oikawa but he is lust from now on-)

Greed: Oikawa (Help i'm running out of characters-
(I wrote Lust first before greed, i just completely forgot about greed and sneaked it in the last minute.)

Sloth: Kenma (I mean... isn't it obvious-)

Lust: Oikawa (He lusts for talent (in volleyball), he lusts for recognition and all sorts of things.)

Gluttony: Ushijima (He is a glutton for Oikawa's attention. Thats how much he wants to be on the same team as Oikawa.)

Pride: Tsutomu

(I love the scene when he was too prideful to ask for Ushijima's advice and said that he shouldnt ask help from his rival but when Shirabu said to him that when it comes to initiation, he is lacking compared to shouyo. He is magically by Ushijima and Hinata's side talking to Ushijima.)