The card bearing his image reads: "Remember the time that you lit a candle when the power was out?".
Watcher has 12 HP and has three forms of attack.
The first is the ability to cast a series of fire lanes vertically across the battle arena. He can dash horizontally across the screen, leaving flames in his path. At the end of this attack the flames left by him will dash towards Young as well. He also has the ability to cast holographic doppelgangers of himself to confuse the player.
Watcher is implied to be a ghost.