コスモアタッカーズ Kosumo Atakkāzu (Cosmo Attackers)
Artwork from Rhythm Heaven and Rhythm Heaven Megamix
Gender Genderless
Appearances Rhythm Heaven,
Rhythm Heaven Fever,
Rhythm Heaven Megamix

The Blastronaut is an astronaut inside a ship that destroys alien invaders. They made their debut in the minigame Shoot 'em Up in Rhythm Heaven.

Physical Appearances

Though it is unknown how they look like without the ship since they don't show up normally, they are credited as a character in the cast credits. The ship is colored white with a red line on it. The cockpit's glass is blue (green in the game), and the engines are gray with green holes inside. Most people often mistake the Shoot-'Em-Up Radio Lady as the one named Blastronaut, but she has her own profile.


In "Crew's Log", It is shown that the Blastronaut has been fighting alien invaders for a long time and that they have nearly lost view of themselves. It is the Radio Lady's voice that reminds them of who they are. The Blastronaut sees her as a dear friend and waits for the day they'll be able to come home to see her again.


By attacking aliens to the rhythm, Blastronaut helps the player to learn copycat/Simon Says rhythms.



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