The first entity you will encounter in the game. It has a very thin body with curved lines. It is also known as Bacteria and first appears in Level 0. Normally, it wanders around Level 0, but once it discovers a player, it chases them with a tremendous roar; since it is quite fast, you must run away quickly as soon as you see it. Be careful, because if caught, you will die instantly. Also, if a siren lets out a roar, it will be attracted and run towards you immediately, so if a siren roars, you must flee from that spot right away. It can talk