Niffty is hyper and spontaneous, as well as being quick on her feet. She is easily entertained, and easily excitable.
She goes absolutely insane when there is a mess in a room and she appears to have a strange obsession with men.
Niffty is a small one-eyed demon, akin to a cyclops, with her eye being made up of a hot pink and orange sclera with a light yellow iris. She also has short yet fluffy pink hair with a yellow undertone. Her teeth are sharp and light yellow, and she has pink dots at each end of her mouth. Her attire is themed after the 50s, as she wears a dark pink scarf, a white shirt with pink dots (which appear to have a slight dripping design) along with a pink skirt with a poodle design and yellow dots. She also has small limbs of dark pink coloration.
- Demon Transformation: Like every other Demon, Niffty has the ability to transform into her Full Demon form and back to her default form at will.
- Jack of All Trades: Niffty is shown to be talented in a handful of ways. She excels at cleaning, cooking, and sewing, outside of work she tends to spend her time reading and writing fanfiction.
- Bilingualism: Niffty can speak both English and Japanese fluently.
- Agility: Niffty is capable of rushing to her desired locations easily and is able to make her way around her surroundings with little to no effort.
- Her name alludes to the word "nifty" which means "to be particularly good (at something)".
- Vivziepop describes Niffty as like Charlie from Always Sunny.
- According to Faustisse, she is hopeless in her romantic life and is also a hopeless romantic.
- Additionally, Niffty died when she was about the same age as Vaggie.
- Niffty’s Instagram account username, @babyfeathrdustr, is a reference to how many people mistake her as a child combined with a shortened version of the word “feather duster”.