∆iden has long black hair, accessorized with a fluffy beige ushanka atop her head. She sports a slightly dark blue navy colored army coat with only one button closed, accompanied by a white undershirt, accessorized by a black and orange scarf. She also wears black fingerless gloves. To finish her attire, she dons a belt and jeans. A large scar is visible by her left eye. Additionally, her ushanka features a triangle crossed by two lines. She also wields a shotgun and fire axe she also doesn't show much emotion or talk much she also lives in a snowy forest she protects.

Fen’s normal appearance displays fair skin with spiky strawberry blonde hair that reaches down to the ground, past her legs with a curvy ahoge on her head, bent like a square. She has a single eye that's visible on her face while the other is blocked by her hair and sharp teeth with a long tongue. Fen dons a black t-shirt with blue jeans that are circled upon halfway on her initial joint on her leg, and around those joints are three wraps of bandages on each limb. Fen’s arms and legs are particularly long, with her hands and feet being black, though her legs are thin and pointy, like a needle. Like most of Katie's characters, she lacks a neck. Personality Fen is normally full of aggression. She is depicted as a ruthless and very violent entity, causing a genocide and massacring a person by biting their face and tearing their limbs apart. However, she holds a soft spot for Xister, her assumed partner. The first video they are in together, Moonlight, showcases their sweet relationship, contradictory to how Fen acts around other people.

The Nameless Werewolf has long bedraggled black hair, with a pair of black horns atop her head. Her face is obscured, and bandages cover her mouth. Like most characters, she lacks a neck. She sports a black coat, with fluff alongside the inside of the coat, accompanied by bloody bandages that cover her chest. She accessorizes a belt with black pants, rolled up to her knees. Her legs are covered in bandages, and her knees and hands are stained with blood. Her pants are frayed, as is her sleeves. She has a long black tail, and black animal paws for feet and legs. Both of her paws have sharp nails. And her right hand is holding a bloody stake. Personality The Nameless Werewolf can be inferred as violent, as she is seen confronting Claire with a blood-dripping stake. Her body also seems to be coated in blood, indicating that Claire is not her first victim. However, she seems to have a soft spot to characters such as Agetha, allowing them to mount her back.

Δlice is a seemingly normal girl with short messy brown hair and tan skin with a pointed ahoge atop her head. She wears a white tiara and a black bow on the left side of her head. She sports a white-collared desaturated blue polo shirt with white buttons. The sleeves appear to be damaged by tears. She wears a black necklace with a bronze transparent triangle crossed through by two lines on it. Her attire is finished with a black tea-length skirt with a white waistband, white semicircle outline designs on the end with dots in between the mounds, accompanied by white socks and black Mary Janes. She appears to have a reddish scar on each leg. Partially Transformed While Δlice‘s appearance mostly remains the same, part of her true form shows. Her clothes seem more tattered and ripped. She dons a tattered capelet with a brown patch appearing on the right side of the poncho with a rhombus symbol on it and a bandage wrapped around both of her sleeves. She still has a black bow but on the right side of her head. The white princess tiara changes to a black crown, and a strange red rash appears on the right side of her face. The top part of her face is obscured, thus only one eye is visible. Six small black spikes poke out from behind her, one of them wrapped in a bandage. Her left leg is covered in three cuts and scars, and she appears to accessorize a black legcuff on her right ankle. Her black skirt has two brown patches with a rhombus and stitches. As seen in a few artworks, she also has a bandage wrapped around her chest. True Form At the end of Basics in Behavior, Δlice is seen in her true form. She takes on a demonic appearance, pitch black and silhouetted with bright red scleras and black slit pupils. Six large black spikes poke out from behind her, and three long tendrils occasionally extend from her back. She has long black claws, and she also has a long black tail. Additionally, she appears to grow in height, as depicted in official artwork where she is much taller than Oliver and Connor.[2] Personality Δlice is aggressive, willing to kill anyone who enters her room. This is seen in Basics in Behavior when Zip and Oliver disguise her room as an exit door to trick Claire. It is possible that Δlice is more dangerous than the teachers, due to how she's locked away and isolated in her room, with "DON'T ENTER" signs on the door. This could also be backed up by the three teachers’ reactions to Claire booking it to Δlice’s room, as they seem to show signs of fear. She is seen being passive with Oliver in multiple official artworks,[3] indicating that she might only be nice to those who are close with her.