this one's gonna be called HIVEMIND Tera, or H.T (for short), basically what happened in the lore is that tera was in her laboratory, "Terrasteel Inc.", when she accidentally dropped a glass bottled chemical that was capable of mutating a person's brain and physical features, along with a hostile personality as a whole, the liquid chemical latched onto her skin, and after 12 hours, she was fully mutated, she decided to go after the other mascots of scratch, but Scratch Cat is the only one alive, Tera is also very powerful with the chemical, despite losing control with it.
@SquigglyTuff for SSS duh