Roslyn Krantz is a federal agent. She and her partner Gilbert D. Stern first appeared in Time Keeps Slipping to question Dr. Light. When Dr. Light called to Light Labs while he was arrested and no one answered, he asked Krantz to check and she discovered Roll was kidnapped by Dr. Wily. She helps Mega Man and the six Robot Masters search them.
Krantz and her partner Stern are named after Guildenstern and Rosencrantz from William Shakespeare's work Hamlet.