Hell Doll

ARC-004C, better known as "Hell Doll", is a malicious entity exclusively available from Custom Mode.
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=== Description ===
The Hell Doll is a variant of the Cursed Doll and one of the fastest entities in The Classrooms. Unlike other dolls, it is engulfed in flames, with fire that never extinguishes, even when exposed to water in The Bathrooms or The Poolrooms. Beneath its fiery exterior, the Hell Doll is a bright red color and is the only doll without a dress.
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=== Behavior ===
The Hell Doll's behavior is nearly identical to that of the Cursed Doll. It only moves when it is not being watched but cannot move in complete darkness due to its flames, which constantly illuminate its body. This illumination serves as a minor additional weakness, but besides that, the Hell Doll distinguishes itself with its incredible speed, currently standing as the fastest entity in the game. Its presence is accompanied by a looping sound of crying babies. When getting in close proximity of the Hell Doll, the player’s camera starts glitching.
Additionally, the Hell Doll is the only doll to play the scare sound upon being encountered.
Players can avoid attacks by looking directly downward, tricking the doll into thinking it is being watched. This method works on the Cursed Doll, Army of Dolls, and Hell Doll alike.
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=== Unique Features ===
The Hell Doll's kill animation is nearly the same as the other dolls. During the animation, its fire isn't visible, revealing its dark red color. This differs from the Army of Dolls, which all share the same kill animation as the Cursed Doll.
The Hell Doll may occasionally break doors. While other dolls can also rarely break doors, this occurs far more frequently with the Hell Doll due to its exceptional speed. This behavior persists even when the "Break Doors" option is disabled in Custom Mode (the default setting), further confirming that it is unintentional.
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=== ARC Document and Custom Mode ===
In Custom Mode, the Hell Doll was initially located in the experimental entities section alongside the Army of Dolls. After the section was removed, both entities were moved to the standard Custom Mode menu. 
The Hell Doll does not have an ARC document.