Fandroid's head resembles a television, which shows two animated eyes and a very flexible mouth. He wears headphones (the shape of which depends on the iteration of design), and his body resembles a jukebox. His lower body is a pole with a wheel at the end, which he uses to move around. His arms are shown to either be flexible or jointed, and he often uses his arms to express emotions in his music videos and face-cam videos on his gaming channel. His head appears to have TV ports on the back (shown in his animated outro and an old ref sheet via Twitter header). He has a wide variety of cartoonish expressions which express many different emotions. His 3.0 redesign included a red bow tie and his mid-section of the jukebox was replaced with a yellow pixel-styled musical note. Fandroid’s personality can be described as curious and childish. This is seen as he enjoys joking and making people laugh. He may be slightly oblivious, as he fails to see anything wrong with ADHOC, describing them as "cool" despite knowing that people have been disappearing around the facility[4], among other things. It's possible he does see how untrustworthy ADHOC is and is just trying not to get in trouble, however. Sum facts: He enjoys watching object shows and admires Lemon Demon. If Fandroid were to fall over, he would not be able to get up on his own, and would need help to get up. He apparently had a marble collection. Fandroid is afraid of water. It is implied in one of the Amanda the Adventurer streams that Fandroid watches My Little Pony

Frogbot has a wide, flat head with yellow froglike eyes. His mouth is a long slit that flashes when he speaks or sings. Both his head and torso are blue, and he wears a red bowtie. His arms are gray and appear to be permanently bent at the elbows. At the end of each arm is a three-fingered claw that Frogbot doesn't seem capable of moving. Like Fandroid, his head and body are attached with a pole. Frogbot's personality can be described as talkative, confident and nerdy. He seems very eager to talk about 404, among other things that other bots had been attempting to avoid. He also likes to ramble about his interests a lot, as Fandroid mentions that he could talk 404's head off. He also really likes talking about The Muppets. Sum facts: He accidentally ate Fandroid's marble collection, mistaking them for fruit snacks. He is a frog enjoyer.

Fandrew is a gray robot that is almost identical to Fandroid. His screen is a dark blue with a blue "poorly-drawn" face which is capable of showing different expressions, just like Fandroid's. Along with this, Fandrew also has a body like Fandroid's, but Fandrew's torso screen has some sort of video playing on it and lacks the speakers Fandroid has. Fandrew also has arms that differ from Fandroid's, which lack joints and claws. Along with his difference in appearance, Fandrew's arms flail around while singing, and Fandroid's do not. Fandrew has a boisterous personality. He is erratic and tends to say random things. He is stubborn, as he constantly bothers B-PO. Sum facts: Fandrew seems to wander the facility. Fandroid says that he or the others won't see him around for a couple days until he eventually reappears. He tends to steal things from the fridge.

Melody resembles a pink, floating doughnut, even according to Fandroid. Her face is a white oval. Her expressions are pixelated and cutesy and mostly act the same way as Fandroid's. However, she has a limited range of facial expressions compared to Fandroid. Melody tends to have a childish and pesky personality, often messing playfully with Fandroid as seen in some of his videos. She's also been shown to be quite mischievous, usually making fun of Fandroid post-editing. She is also known to pull pranks often, and Fandroid once claimed that she's a liar. However, she is also known to be quite sweet, as she shows genuine concern, support and encouragement in the few lyrics and songs she's made. As Fandroid has stated, she's a nice robot who "just has some, you know, problems with her programming". Sum facts: She's a fan of the Warrior Cats books, Invader Zim, and Tally Hall. She is a fan of Stella from Angry Birds. Melody's favorite character in the 2005 film Robots is Phineas T. Ratchet. Melody likes Gorillaz. The vents are Melody's "happy place". She believes 404's face is handsome. Melody believes she can "fix" 404. Melody wishes she was a cake bite. Melody believes ADHOC is embarrassing.

404 is a tall humanoid robot with an entirely monochromatic color scheme of black and white. He has a pale white face, and a thin, endoskeleton-like appearance. He also has sharp, claw-like hands, and a large cuboid object on his chest. 404 is covered in wires. He also has legs, unlike any other known Fandroid character. 404 can be described as very formal, who believes himself to be superior to other ADHOC robots. He is very confident in his abilities to locate and destroy other robots, and takes himself fairly seriously. He believes Fandroid and Melody to be "degenerates", likely because of their hobby of playing Roblox.[7] 404 has hacked into B-P0's mapping systems, and claims he will soon find his physical body and "rip him apart".[8] 404 is supposedly not waterproof, according to B-PO. 404 is bisexual