Kōichi Yamadera
Spike was created by Shinichirō Watanabe and Toshihiro Kawamoto as part of the production entity Hajime Yatate. Created as a mirror image of Watanabe and based on Yūsaku Matsuda's portrayal of Shunsaku Kudō in "Tantei Monogatari", he was designed as someone who would expect others to follow his lead. Kawamoto deliberately designed him to appear "uncool" to create the opposite effect for viewers. His final confrontation with Vicious was planned well in advance. His portrayal in the later movie adaptation displayed the character's softer side and inner thoughts. Spike is voiced in Japanese by Kōichi Yamadera. In the English dub, he is voiced by Steven Blum.