
Quick answer — Arisa Komiya voices Dia Kurosawa in Love Live! Sunshine!!, Koharu Kawasaki in The Tunnel to Summer, the Exit of Goodbyes, Mana Kase in D4DJ First Mix and 2 more characters.
Arisa Komiya voices Dia Kurosawa (Love Live! Sunshine!!), Koharu Kawasaki (The Tunnel to Summer, the Exit of Goodbyes), Mana Kase (D4DJ First Mix), Erika Kaga (Kemono Jihen), Tsukasa Aizawa (The Red Ranger Becomes an Adventurer in Another World).
Dia Kurosawa is voiced in Japanese by Arisa Komiya.