Listen to 【Mirai Nikki - Future Diary OST】Sixth's Battle Theme【Extended】 by Yawu in Mirai Nikki/Future Diary OP/ED and more! playlist online for free on SoundCloud
Tsubaki Kasugano - The Sixth by IzuHero on DeviantArt
Tsubaki Kasugano / Sixth Voice - The Future Diary: Redial (TV Show) - Behind The Voice Actors