God there's loads.
Nishinoya
Hinata
Kageyama
Kenma
Kuroo
Oikawa and I didn't even like him at first
Koganegawa or as my brother calls him "Psyduck"
Semi
Terushima
Iizuna
Kita even though I cried when he spoke (same VA as Eiji Okumura)
Atsumu
God I've just realised. Of all the Haikyuu fanfic's I've written, I haven't written Kita, Iizuna and Koganegawa