ELEANOR FAIRCHILD — A teen-age girl who eventually becomes MILADY - Superhero of Innerspace.
ELEANOR'S MOTHER — An unassuming woman who loves her daughter and anxiously awaits the day when she will grow out of her comic book craze.
SPACEPUNK — The hero, captain of the Starmites, and heart throb of the Universe. THE STARMITES — A teen-aged band of Space youths dedicated to fighting the deadly forces of the Universe. They include:
HERBIE HARRISON — The organized and methodical member of the group - he plays by the rules.
DAZZLE RAZZLEDORF — The bumbling show-off of the group. Openly expresses his feelings.
ACK ACK ACKERMAN — The group's tough guy. He is second in command.
SHAK GRAA — High Priest of Chaos, determined to destroy both Earth and Innerspace.
TRINKULUS — A reptilian minstrel, once slave to Shak Graa now serving as a guide to the Starmites. (Doubles as SHAK GRAA.)
DIVA — Imposing and powerful Queen of Innerspace. (Doubles as MOTHER.)
BIZARBARA — Awkward and shy daughter of Diva, possessed with a heart of gold and a yearning to be "normal and average." (Doubles as ELEANOR.)
DROIDTHE BANSHEES — Amazonian bombshells, and henchwomen to Diva. They include:
SHOTZI – Diva's airhead sergeant at arms.
BALBRAKA — who delights in dominating the STARMITES.
CANIBELLE — who delights in devouring the STARMITES.
HOLLABACK — who delights in teasing the STARMITES.