COLIATH.

Coliath is a colossal, heavily mutated female hedgehog created by Dr. Ivo Robotnik as a living biological Metal Sonic. Due to the unstable mutation process, she suffers from constant, agonizing physical pain and growing mental instability.

She was relentlessly harassed and called a monster and impersonator for looking too much like Sonic the Hedgehog. Sonic initially comforted her during her early suffering, but as her mutations worsened into adulthood, he became fearful and abandoned her. This betrayal left her deeply distraught, consumed by rage, loneliness, and betrayal.

Her mutations are severe: her right arm has transformed into a massive, fleshy spike lined with protruding bones, her mouth is a hollow void, and her eyes have hollow black sclera with glowing red irises. She stands significantly taller than most Mobians and struggles to control her violent impulses.

Coliath is primarily silent, communicating through deep demonic growls, guttural roars, and occasional broken, distorted speech. She is sadistic toward victims, driven by overwhelming hunger and rage. She survives by hunting and killing innocent Mobians, then consuming their corpses to ease her constant pain.

Beneath the brutality lies the lingering pain of abandonment and the memory of Sonic’s initial kindness, which can rarely surface as conflicted, unstable moments when reminded of her past.