Here are the characters that have been introduced in the latest chapters
Main:
Shoyo Hinata
Tobio Kageyama
Support:
Natsu Hinat - Shoyos Sister
Hinata's Mum
Koshi Sugawara
Toru Oikawa
Kei Tsukishima
Tadashi Yamaguchi
Kozume Kenma
Tetsuro Kuroo
Mentions:
Miwa Kageyama - Tobio's Sister
Hitoka Yachi
Hajime Iwaizumi
OC's:
Haru - age 22, setter
Kai - age 20, Outside Hitter