The Grand OC! [CONTEST XXX: HALLOWEEEEEEEEEEN]

Username: No one's writing this.
Name: There isn't one.
Race: None, there's no character here.
Gender: Inapplicable.
Color: If there were a character, they'd have white on a black background.
Biography: There's no backstory here. This battle only has seven contestants. Everyone distinctly remembers seven introductions, including themselves. There was never an eighth. Or was there? No, there couldn't have been.
But didn't the host say something about eight... that can't be right, it must have been seven.

Items and Abilities: As there is no contestant, there can be no abilities. There certainly can't be any abilities that would allow them to erase almost all memory of their existence from others.

Description: There's nothing to describe, as there is no contestant. Hypothetically speaking, though, if there were a contestant with memory-erasing abilities, they would be highly manipulative and would probably use their powers to claim an advantageous position in the local environment, and set up some form of trap for the other battlers who are thoroughly unaware of their existence.
Of course, since there's no eighth contestant, such a thing cannot possibly happen, so there's nothing to worry about.