Fusichor

The Cursed Entity, he was once known as Indigo. As the previous embodiment of curiosity, he was exploring a cave when he discovered a mushroom. This mushroom infected him with a sentient virus, known as Skin Fusion, or Fusichor. Fusichor started a Fusing process with Indigo and took over his body, nullifying his powers and mind to the point of no return. Indigo is dead. All that remains is the Chorus.

Note: The Chorus is the offspring/virus part of Fusichor. To put it simply, Fusichor is the brains, the conductor if you will. And the Chorus is, well, the chorus.

Note 2: Credit Sushisloth, she made the base, I just added the eyes and emblem.