
Quick answer — Konomi Inagaki voices Kei Amane in Gals Can't Be Kind to Otaku!?, Serufu Yua in Do It Yourself!!, Idora Arvoln in The Red Ranger Becomes an Adventurer in Another World and 14 more characters.
Konomi Inagaki voices Kei Amane (Gals Can't Be Kind to Otaku!?), Serufu Yua (Do It Yourself!!), Idora Arvoln (The Red Ranger Becomes an Adventurer in Another World), Youko (Touring After the Apocalypse), Mina (My Wife Has No Emotion), Seika (Uglymug, Epicfighter), Lilique Kadoka Lipati (Mobile Suit Gundam: The Witch from Mercury Season 2), Haruko (ZENSHU) and 9 more.
Kei Amane is voiced in Japanese by Konomi Inagaki.