Christopher Corey Smith has a voice-acting credit as John Balks in the manga series written by whom?
Christopher Corey Smith:  Some of his major roles include Spandam in "One Piece", John Balks in "Future Diary", Raizer Phoenix in "High School DxD", and Soyuz in "". Future Diary: Future Diary (Japanese: 未来日記 , Hepburn: Mirai Nikki ) is a Japanese manga series written and illustrated by Sakae Esuno.
Sakae Esuno