Naoko has done the following roles in audio drama.

Ariel [CT]	?
Eternal Melody [CD, radio]	Carrot Shields
Karura Mau! "Nara Onryou Emaki" [CT]	?
M.M.S. Bangai Dreaming Party Yuki [CD]	?
Scramble Wars "Yami no Labyrinth" Drama Hen [CD]	Catty