What is Rush's particle decal called

Which entity is shown on the "2 DAYS" image before the Tower Heroes Event

Figure gets crucified but fails, so they all hide in the closets

Figure gets crucified but it fails, but they manage to get to Door 51

Figure doesn't have an ending cutscene, he ragdolls and you get the tower.

Figure reachs the end of the map and you lose, but get the tower anyways.

After using code "LOOKBEHINDYOU" open the console and you'll find it

El Goblino's Dialogue after obtaining the "I Hate You" achievement

The rooms is blocked by a red light in Super Hard Mode.