
Quick answer — Rikako Aikawa voices Haré in Haré+Guu, Koushi-kun in Hamtaro, Kurumi Saiki in The Disastrous Life of Saiki K. and 8 more characters.
Rikako Aikawa voices Haré (Haré+Guu), Koushi-kun (Hamtaro), Kurumi Saiki (The Disastrous Life of Saiki K.), Pyoran (To Your Eternity), Akira Emori (Detective Conan: The Phantom of Baker Street), Kei no Haha (Oblivion Battery), Koduck (Pokémon: The First Movie), Fina S. Shinozaki (Infinite Ryvius) and 3 more.
Haré is voiced in Japanese by Rikako Aikawa.