They are, as the fan name implies, cross shaped enemies that slowly follow the player character around, mostly to knock them off ledges or into pits. This can make them hard to shake off if they catch up to player without use of a slide or dash. They can easily be defeated by any attack, but they will respawn almost immediately. This makes them ideal for harvesting power-ups by repeatedly killing them and letting them respawn. The Demon's Crosses function similarly to the Tellys in various Mega Man games starting with Mega Man 2.