Mariko has done the following roles in audio drama.

Aoyama Nichoume Gekijou [Radio] {Adachigahara no Natsu}	Saitou Azami
Atelier Viola [CD]	Viola
Edelweiss: Eidenjima Pollen War [CD]	Ibuki Mei sensei
Granulated Happiness [CD]	Marimo Kyouko
Green Green [CD]	Iino Chigusa
GS Mikami [CD]	ijiwaru ane B
GS Mikami [CD]	onna A
Hiraiteru door kara shitsurei shimasu yo [CD, Radio]	Yoshioka Yoriko (Yottan)
Ludvig Kakumei [CD]	majo
Meltylancer [CD]	Ferunatesu Firii
Riviera -Yakusoku no chi Riviera- [CD]	Marisu
Sangokushi DX [CD] {DX 4}	?
Sentimental Graffiti [CD]	Sawatari Honoka
Tales of Phantasia [CD] {Anthology 2}	Amii
Xenosaga [CD] {Volume 2-3}	Kos-Mos