Plague Rat is a powered up version of Berserk Mouse from the Forest. They are immune to poison and have a high speed, which allows them to evade attacks and escape from battle. They are lurking in the Shrine of Shirley. Plague Rats' main attack is to bite the party which deals small amount of damage. They can also use their special attack, Chisel, which they transmit their tiny little pink-coloured "plague" particles to a party member and cause Arm Blocking on him/her.