Appearance of Coolkidd: c00lkidd is solid red, with a fleshy body. The words "team c00lkidd join today!", an advertisement for his hacker group is pasted across his torso and arms. Many of his bones are visible through his skin, including his ribs, vertebrae, shoulder blades, knees, and pelvis. He has beady black eyes and a wide, c00l smile, seemingly carved into his face.

Appearance of Jason: Jason was based on Jason Voorhees, the iconic slasher villain from the American horror franchise Friday the 13th. His in-game design was specifically modeled after the old version of Jason from the Roblox game Survive and Kill the Killers in Area 51, where he appeared as a Roblox character with a shadowed head and his identity concealed by a signature hockey mask. He wore a dirty, open tan-gray coat over a black shirt, along with black slacks and gray shoes. Jason carried a machete in one hand while a chainsaw was strapped to his back. This look was primarily based on his appearance in the 2003 film Freddy vs. Jason.

Appearance of Slasher: Slasher is the successor to Jason and carries many of the same references. His design is inspired by Jason's appearance in the Roblox horror game Survive and Kill the Killers in Area 51, while his role as a slasher draws from Jason Voorhees of the American horror film franchise Friday the 13th. Slasher's head is concealed by a black shroud with a crude hockey mask with a mouthpiece similar to what Hannibal Lecter wore in the movie The Silence of the Lambs, the black shroud is ripped and tattered across his chest beneath a worn green coat. He has the Necrobloxicon stabbed into his shoulder, "Guiding him". Underneath, he has a bandaged-over blue motorcycle shirt, with his arms also wrapped in bandages and gloved hands. He completes the look with black boots. Beneath the mask and bag lies a disfigured face with brown, bacon-like hair.

Appearance of 1x1x1x1: 1x1x1x1 bears the appearance of the "1x1x1x1" toy prototype. They have pitch black skin with a green domino crown. Their face being pitch black makes it nearly impossible to see their facial features, so the only part that's visible is a single eye, which glows red and gives off a bright glare, that intensifies when using a move. Underneath the pitch black skin and red eye is the default Roblox face, albeit hard to see. 1x1x1x1's chest is see-through and green, with a Skeleton torso inside. They carry a Venomshank sword in each hand, black and green flames can be seen emitting from their body and swords. 1x1x1x1's body also seems to have a high saturation filter on it, making them unnaturally bright compared to their surroundings.

Appearance of John doe: John Doe appears as a light-skinned Robloxian with a yellow torso, representing a shirt, and blue legs, representing pants. The most obvious sign of his corruption by the defunct Roblox code is his deformed right arm, which is completely coated in black corruption and shaped into a spike. Red binary code seeps from the limb, and his right eye has turned entirely red, surrounded by the same black corruption. Some of the corruption has spread to his back, causing his spine to protrude visibly. His left hand is also corrupted, coated in black corruption and forming three black claws with red binary code seeping from them. Additionally, his legs are partially covered in corruption.

Appearance of Azurewrath: Azure is a black-skinned Robloxian with several black tentacles on their back that appear to drip with some sort of fluid. In addition, they have spiky black hair (likely scene hair, although there is not enough detail in their concept art to confirm this) and one visible eye that glows indigo. They wear a black pointed hat with a glowing purple face, likely inspired by the Blizzaria Warlock hat in their old design, as well as a torn black capelet. They have a glowing purple Spawn emblem on their chest. Before he was transformed into a monster, he was a pale-skinned Robloxian with black scene hair, dark grey fingerless gloves, a dark grey torso to represent a shirt, and grey legs to represent pants. They have a Spawn emblem on their chest, just like Two Time has on their chest. He wears a hat that resembles Gray Old Wizard Hat. He appears to be without eyes, shown in the render Milestones 1, 2, and a photo of them together. Azure is a black-skinned Robloxian with a purple torso, along with four black slimy tentacles on their back. They have purple eyes with a hat that resembles the Blizzaria Warlock hat. Along with that, they also have a zipper shaped like a frown as their mouth, and a black spawn emblem on the front of their body. Before he was transformed into a monster, he was a pale-skinned Robloxian with black scene hair, dark grey fingerless gloves, a dark grey torso to represent a shirt, and grey legs to represent pants. They have a spawn emblem on their chest, just like Two Time has on their chest. He wears a hat that resembles Gray Old Wizard Hat. He appears to be without eyes, shown in the render Milestones 1, 2, and a photo of them together.

Appearance of Doombringer: Doombringer's design is based on the former Roblox Super Moderator MrDoomBringer. Doombringer wears a bucket hat helmet which the holes that he sees out of are adjusted to form the outline of an angry face. Doombringer also has curved horns, armor on his upper torso and feet, and a cloak around his body, as well as a glowing left eye. Doombringer also wears gloves and has 2 chains wrapped around his body. On Doombringer's upper torso armor, he wears a name tag with “DOOM” written in blue that is bleeding out of the name tag. His weapon of choice is a large red Ban Hammer covered in spikes, with the pommel of the hammer being a spike.

Appearance of Noli: Noli is seen with the right half of his face being a white, sculpted tragedy mask with a purple swirl on his cheek. His eyes and mouth look to be glowing a soft white. The left half of his face is a distorted purple skull with its teeth clenched, below an empty eye socket. On top his head, there is a jagged regal steel crown with two miniature theater masks placed in the middle of the crown that alternate from comedy and tragedy. There is also a void star shaped jewel placed on top of the crown. In his right hand, he holds the glowing white void star. The right half of his body is a purple suit, whereas the other half is a fleshy purple. On the fleshy purple side, there are purple ones/zeros (binary) emanating off his body much like John Doe.

Appearance of Mafioso: Mafioso has a yellow skin tone and wears a black pinstripe fedora that casts a shadow over his eyes. He is dressed in a black three-piece suit with a white dress shirt and striped tie, black pants, and polished shoes. Over it all, he dons a long black overcoat that flows past his legs, with a small golden pocket watch chain visible from his vest pocket.

Appearance of guest 666Guest 666 has some resemblance to their origin, but their design is quite different. Guest 666 has a pitch-black head, a black cap with a red brim with an "R" on it, and "Roblox" written across their torso and arms. Their hands and claws are a bright red with a black outline seemingly made out of solid material to resemble chains, their horns are bright red and lyre-shaped, his legs are unguligrade, and their hooves have a red "flame" effect. They also have a large dark red "mane," and a bright red tail with the Roblox logo at the tip of it. Most of Guest 666's body has the metal texture, and their kneecaps are spheres with a metal rim above them. Guest 666 also has a red face, with a large mouth, black teeth, and wide, red, seemingly bleeding eyes.