
Quick answer — Mariko Kouda voices Nayuki Minase in Kanon (2006), Miki Koishikawa in Marmalade Boy, Lufa in Dragon Half and 17 more characters.
Mariko Kouda voices Nayuki Minase (Kanon (2006)), Miki Koishikawa (Marmalade Boy), Lufa (Dragon Half), Holly (Monster Rancher), Kaya (One Piece: Episode of Merry - The Tale of One More Friend), Chifuyu Yukishiro (Senryu Girl), Sachiko Yasuoka (Shion no Ou: The Flowers of Hard Blood), Miki Imaina (Shounan Junai Gumi!) and 12 more.
Nayuki Minase is voiced in Japanese by Mariko Kouda.