
Quick answer — Seiko Yoshida voices Pekepeke in Genius Party Beyond, Zest in The Testament of Sister New Devil BURST, Kyousuke Kamijou in Puella Magi Madoka Magica and 5 more characters.
Seiko Yoshida voices Pekepeke (Genius Party Beyond), Zest (The Testament of Sister New Devil BURST), Kyousuke Kamijou (Puella Magi Madoka Magica), Lina (Princess Jellyfish), Sanae Mizuno (Another), Julia Chang (Tekken: Bloodline), Kayo (Manyu Scroll), Rika (AMNESIA).
Pekepeke is voiced in Japanese by Seiko Yoshida.