
Quick answer — Eri Nakao voices Hikaru Ichinomiya in Shugo Chara! Party!, Maki in K-ON!: The Movie, Yukika Saegusa in Fate/stay night: Unlimited Blade Works and 13 more characters.
Eri Nakao voices Hikaru Ichinomiya (Shugo Chara! Party!), Maki (K-ON!: The Movie), Yukika Saegusa (Fate/stay night: Unlimited Blade Works), Dorlin (Little Witch Academia (TV)), Hannah England (Little Witch Academia (TV)), Kato (Genshiken 2), Miki Hanabishi (Hayate the Combat Butler), Shiori Usami (World Trigger) and 8 more.
Hikaru Ichinomiya is voiced in Japanese by Eri Nakao.