@

@ is the player that you control.

Behavior
@ can move like a pilus, in any direction, but does not move into the object it destroys. Also, @ has a limited time to live, 48 moves, and will evaporate if he does not reach the exit in time.

Backstory
In Red Rogue, if you look inside of "Lore" in the menu, and look at "Rogue", it says that she is the widow of a person named @. It is very likely that the developer was mentioning @ in this game, indicating that Ending has some connection with Red Rogue.