Renge is a young girl who has lavender hair that is tied in two pigtails with yellow ribbons (the yellow ribbons seem to have been given by Dagashiya (Candy Store) when she was a baby) and reddish-brown eyes that are always half open. In chapter 4 of "Non Non Biyori Remember", Renge uses a pony tail in one side just like Kaede's used in her youth One of the main characters in the Non Non Biyori series, Renge is one of the most unique and mysterious, she is considered to be precocious child with a tomboyish side. She has a curious nature and a unique naming sense. She gets excellent grades in school and has demonstrated excellent artistic skills. She even picked up multiplication solely based on Konomi Fujimiya's suggestion to use addition as a base for multiplying. She is shown to be friendly and affectionate and loves being around people. She eventually develops a more mature personality during the third season.Natsumi Koshigaya's nickname for her is "Ren-chon". Renge is 117 cm tall. In the second installment of the Non Non Biyori series, Non Non Biyori Repeat, Renge gets the most screen-time out of any character in Non Non Biyori Repeat. It is shown that Renge is talented in drawing and can do multiplication just by adding the numbers in her head instantly. Renge loves rabbits and curry. Renge has smiled only twice in the first season. Renge has got a pet tanuki named "Gu". She is sometimes seen preparing food for Gu. She has calling sounds to interact with Gu. One is a silent one-hand whistle, whilst the other is an audible two-hand whistle to try and order Gu to do its tricks (although mostly unsuccessfully). Renge had a tadpole shrimp named "Hirataira-san" (Flatty-san). Renge's family owns a mountain. Renge is one of the two only main characters in Non Non Biyori to have half-open eyes, while most characters have fully open eyes, the other being her older sister Hikage.Renge likes creating her own songs, and she is often shown playing them on her recorder. She got her recorder from Kazuho on her first day of 1st grade. Renge is always seen with a ribbon as a part of her outfit, either on her clothes, or tied in her hair. Her swimsuit has a pink ribbon on it.[7] In the OVA episode, she is seen wearing a yellow pompom ball hair tie instead of her yellow ribbon. In chapter 4 of Non Non Biyori Remember she has the same haircut that Kaede used to have when she was young. Renge sometimes has strange thoughts when she sees Suguru, making her suddenly run to Natsumi to tell her what she thinks.Renge is considered by some people to be precocious due to her great mental calculation and artistic skills. On the other hand, such consideration is just when someone ends up trapped in the rabbit pen or locked into handcuffs. Her prototype is Rin Aragaki from Toko Toko.[verif[9]y] She prefers warm colours. "Rabbit pen, rabbit pen~♪ let's take care of the chickens~♪ Let's take care of the rabbits~♪ Let's groom them nice and pretty~♪ Then put it all together and... Dynamite!"