All Characters
Main Characters
Shirokuma
A shy polar bear who ran away from the Arctic Circle. It is sensitive to the cold and feels most at home while drinking hot tea in the corner. It likes to draw and bathe in hot springs and has an easygoing personality.
Penguin?
Resembles a green penguin, but is unsure if it really is one. It likes eating cucumbers and has vague memories of having a plate on its head (both of which strongly imply that it is a kappa).
Tonkatsu
An edge slice from a fried pork cutlet. It is composed of 1% meat and 99% fat, so it was left behind on its plate after the meal finished. It often puts condiments like sauce, salt, and mustard on itself to assert that it is still edible.
Neko
A timid and socially anxious calico cat. It is self-conscious about its rotundity. It often gives the corner away to other Sumikko because of its personality. It feels safe when snugly covered, like in a pouch or under an empty cat food can.
Tokage
An aquatic dinosaur who poses as a lizard to avoid being captured. It was separated from its mother, but they later reunited. It is friends with Nisetsumuri, the fake snail, and Tokage (Real), who is an actual lizard. characters but was added after about three years.
Minikko
A play on the word Sumikko, these characters are the smaller counterparts to the five main Sumikko characters.
Furoshiki
Shirokuma's pink furoshiki cloth with cream-colored spots. Shirokuma often uses it to claim a corner spot, as a blanket, and in many other ways.
Zassou
A shrub of weed that has big dreams and a positive attitude. Its dream is to be used in a bouquet at a flower shop one day. Because Neko waters it often, it is the closest with it.
Ebifurai No Shippo
The leftover tail of a fried shrimp. Because of their similar past, it is good friends with Tonkatsu. Like Tonkatsu, it refries itself instead of taking baths and likes to apply tartar sauce to itself or hold a cherry tomato.
Nisetsumuri
A slug who carries a shell on its back and pretends to be a snail. Because of its guilt over its dishonesty, it apologizes more than necessary. Because of their similar false identity, it is closest friends with Tokage.
Obake
A timid ghost that likes funny things but avoids laughing to avoid scaring people with its big mouth. It lives in a corner of the attic and likes to clean, and is also seen working part-time at the Kissa Sumikko.
Tapioca
Tapioca pearls left over from a cup of milk tea. When they were still floating in the milk tea, they were smiling, but now their expression is emotionless. They come in pastel yellow, blue, and pink, as well as black. The rarer black Tapioca are more mischievous than the others. One of the yellow Tapioca is friends with Penguin?
Hokori
Wisps of dust accumulated in the corner. As with the Tapioca, there are multiple Hokori, but they can also combine and dissipate. They are weak against water.
Suzume
A sparrow that flies by to nibble on Tonkatsu's crumbs.
Fukuro
A nocturnal owl who keeps trying its best to stay up in the daytime.
Other
Arm
A robot arm similar to that of a UFO catcher. It occasionally appears to snatch Sumikko (Penguin? being its favorite catch), who attempts to steal the corner with illegitimate means. On one hand, it is feared by the Sumikko, but on the other hand, sometimes it takes care of their well-being.
Yama
A small, conical, white-and-blue mountain that admires Mount Fuji. It appears at hot springs, standing in for the paintings of Mt. Fuji one often sees at a SentÅ. It turns red when entering hot springs.
Mogura
A grey mole that used to live in a corner underground. Because of the commotion above ground, it became curious about it and surfaced for the first time. Likes to wear red boots.
Penguin(real)
A friendly and approachable penguin who travels around the world. It informed Shirokuma of warmer regions in the south. It shared its souvenirs with the Sumikko, such as rock salt, pearls, and photographs, which it stores in a blue and white striped furoshiki cloth.
Sumi-ssie
A long-necked creature that appeared in Sumik-ko. She is Tokage's long-lost mother, and a very gentle dinosaur, who came from the sea to visit Tokage. Since the other Sumikko do not know that Tokage is a dinosaur, they have not realized that Sumi-ssie is its mother.
Tokage (Real)
A real lizard who lives in the forest. It is a friend of Tokage who has a carefree personality and doesn't care about the details.
Mame Master
A black coffee bean who is the master at the Kissa Sumikko cafe where Obake works.
Sumigamisama
The God of Sumikko and is always watching them from somewhere. It is said that he appears once every five years. He has spent many years training in the corner and is now perfectly corner-shaped.
Wata
A special piece of cotton batting from inside Tokage's treasured stuffed toy.