Akio Otsuka

Old Snake (voice)

David Hayter

Old Snake (English voice)

Hideyuki Tanaka

Hal "Otacon" Emmerich / Jonathan (voice)

Christopher Randolph

Hal "Otacon" Emmerich (English voice)

井上喜久子

Sunny / Rosemary (voice)

Cristina Pucelli

Sunny (English voice)

青野武

Roy Campbell (voice)

Paul Eiding

Roy Campbell (English voice)