Kazuya: A computer programmer, 20 years old, and a SociallyIneptMaleMainCharacter. Good-hearted, easily embarrassed. This happens quite a bit when he gets surrounded by progressively more RobotGirls.
May: A Cyberdoll = robotic girl. Tries her best to serve Kazuya as a maid, but she's hampered by the fact that she's only 6 inches tall. Has a USB connection in a place best left undescribed ^^;;;
Kasumi: The cute daughter of Kazuya's landlady. Kazuya and Kasumi have known each other for a long time; if Kazuya wasn't a SociallyIneptMaleMainCharacter it'd be astonishing that they hadn't got together.