Kōji Wada is a Japanese rock singer who provided the vocals for numerous songs throughout the series. He died on April 3, 2016 due to complications from cancer.
- Target~Akai Shougeki~ Single
- The Biggest Dreamer
- Hontō no Tsuyosa
- 3 Primary Colors (with Ai Maeda)
- With the Will
- an Endless tale (with Ai Maeda)