They/Them Seth is a purple-colored humanoid plant with glasses, long deep magenta hair, and a lavender tie. Their hair sort of tufts up, with bangs coming across above their glasses. They have prominent front teeth, almost rabbit-like. Their dress tapers off into uneven partings around the waist, partial to the left. Though somewhat chubby, their build is generally pretty average. Seth's idea of being "human" means being the smartest, and always searching for knowledge. Seth is a bookish, aspiring intellectual and tactician. Seth is seen to generally employ more strategy into their plans than others, and often tries to command their allies on exactly what to do. While trying to seem tough and calculated, Seth cares deeply for their attachments, primarily with Aqua and Asgore. Seth takes interest as well in engineering, arts, and literature. Seth likes control and order, and often tries to do things by the book. They often hang around Aqua, and try to correct her many misconceptions about humans.

She/Her Aqua is a light blue humanoid plant with a cyan dress, red shoes, long black hair that curls up, a red band around her neck, and a red heart-shaped ribbon in her hair. She only has one eye, almost always hidden by her bangs. Aqua's idea of being "human" revolves around her impression of Asgore's former adoptive child, Kris, though she doesn't realize this. Aqua is playful and silly, but also hyperactive and often naïve or careless. Aqua usually has a tenuous grasp on what is happening around her, and is often violent without realizing how dangerous she is being. She often hangs around Seth, and loves to play with them.

She/Her Orange is a small mouse-like plant with an orange fur coat, bandanna, and pair of boxing gloves. Orange's idea of being "human" revolves around being the strongest, and intimidating one's enemies. She is very hotheaded, and can be quite defensive about her size, strength, and especially her species. Because of this, she often hangs around Green and Pink since they're the most supportive. Orange is especially close with Pink, considering her a sister.

They/Them Green is a green humanoid plant with a pair of green-colored shoes, a lime suit with a green apron over it and a lime chef hat. They have two very close eyes with green pupils, with prominent eyelashes. They are seen running most of the shops around the entire Dark World. They almost always have a soft smile on their face. Green's idea of being "human" revolves around showing unconditional kindness, even to enemies. They can be shy, but are very kind and caring, even if sometimes irritable. Green is voluntarily mute, and communicates with hand gestures and body language, or written signs. They often hang around Orange, and reassure her about being human.

He/Him Yellow is a yellow humanoid plant with a short yellow mullet, dark yellow cowboy hat, a dark yellow cowboy suit, and gold spurs attached to his dark yellow boots. He has a simplistic face with beady eyes, a wide grin and a square-shaped jaw, while the rest of his body is thin and gangly. Yellow's idea of being "human" revolves around seeking justice, though his extrene naïvete often leads to him believing anything told to him and reaching wild conclusions. He often hangs around Blue, his romantic partner, and would likely do literally anything for him.

He/Him Blue is a humanoid plant with dark blue skin and light blue hair. He has textured hair worn in a ponytail, as well as prominent eyebrows. He almost always has his eyes closed. His attire consists of a light blue bodystocking, a tutu skirt that resembles flower petals, ballet shoes. Blue's idea of being "human" revolves around expressing love towards those one cares for. He portrays himself very elegantly, often restraining his emotions and speaking poetically. He often hangs around Yellow, his romantic partner, and reassures and consoles him when his naïvete gets him into trouble.

He/Him Flowery's skin, as well as his hair, are bright yellow. His hair is short, with the top and bangs being swayed to the right and slightly upwards. His outfit consists of a white collared shirt overlaid with an orange and green vest, a black mantle which he carries over his shoulder, brown pants, and black shoes. Flowery's idea of being "human" revolves revolves around friendship, and the power it brings. He makes a point to help everyone, even his enemies, though his preppy and occasionally bossy personality often gives the impression that he is uncaring. He is the leader of the flowers, and the most invested in keeping Asgore in the Dark World.

She/Her Pink is a typical anime catgirl. She wears a pink, short dress adorned with ribbons, and a yellow heart-shaped necklace. She has cat-toy bells for earrings, light pink-colored short hair and cat ears. In reality, Pink is the anime character Mew Mew, but acts as if she is one of the flowers to fit in. Orange is the only one to know Pink exists, and the two share a close, sisterly bond.

He/Him A large, caring, goat-like Lightner. He grew the flowers himself to propose to his now-ex wife, so they see him as a father and wish to be his "new family" now that they have humanoid bodies. They want to keep him in the Dark World to distract him from his sad life in the Light World.