Lenneth is a nargacuga taur, the size of a gold crown nargacuga. Her lower body is typical to that of a feral nargacuga, but where the head should be is instead an anthro nargacuga's torso from the waist up. She's got a good appetite, and tends to overindulge on food. Both her upper and lower bodies are slightly overweight, with two pudgy bellies that would make a great pillow or bed.

Lenneth is blind and relies on her sense of hearing and smell to navigate her surroundings. As a result, her ears and nose are super sharp. This lets her hear and smell things many others can't perceive, but it also makes her very vulnerable to loud noises and getting sonic-bombed.

She has a motherly and bubbly personality. She is kind and compassionate, always concerned about the wellbeing of others. She has strong maternal instincts and tends to mother others. She is a pacifist, preferring to avoid fights unless she or her family are threatened.

Her voiceclaim is Kitty Softpaws from Puss In Boots: The Last Wish.

She has pumpkin-sized breasts, but their size can get bigger as they engorge with milk. Her breasts are sentient, having the mental capacity comparable to young toddlers, and can move their flesh as if they were limbs. They can form shapes of hands and faces and bulge them out of themselves in order to express their feelings, interact with the world or scare people. She treats and refers to them like they were children, and treats them accordingly; she would cradle and shush them when they're being restless or overproducing milk. Though her breasts have no sense of sight, they can somehow hear and smell. They cannot speak, but they can make gurgling, churning and throbbing noises with their internal activities.

Lenneth is immortal, and had lived a very long life. During that life, she served a royal family as a head-maid, and had adopted two other characters, Taketzu and Calavera, as her own children.