|Offical Artwork||First Appearance: Hebereke
Latest Appearance: O-Chan No Oekaki Logic Series
|Voice: Norio Wakamoto|
Unyoon is the main antagonist in the Hebereke series. He's often seen as a supposed final boss before you battle a Hebe clone. In the original Hebereke, he is the final boss of the game who guards the rocket to get back to Hebe's world and will shoot himself from his big form to the player.
While it's unsure what Unyoon's species is, he has green skin, wears a metal spike hat, has a clear orb in the middle of his body, has purple feet, and wears orange lips and pants.
Unyoon has a lot of unique moves. He can shoot a spike from the top of his head and do an electric attack to secure himself against enemies.
- Sometimes Unyoon's name is spelled "Unyo" abbreviated.