Recurring
Tama
Voiced by: Yuko Kobayashi
She is also one of Nyago's classmates. She is very sober and docile, and is quite a hard working person. She likes Nyago because of his good qualities. Tama is also a friend of Niyander.
Charmin
Voiced by: Teiyu Ichiryusai
She is Nyago's classmate. She is fat but strong and good in sports, and has a big nose.
Cat wizard
Voiced by: Yuzuru Fujimoto
He is the one who gave Nyago the mission of to help people in trouble and maintain peace. He wants to save the world from chaos, destruction, and the evil. He chooses Nyago to help him as Nyago is unselfish and down-to-earth. He first makes him Masked Niyander, and then later makes Miko Junior Niyander.
Tanuko
Voiced by: Yuko Kobayashi
She is a raccoon dog, and is very cunning. She helps her older brother HeHe Manto just like Con helps Niyon. She likes teasing Niyon and putting him into trouble. Because of this, she and Con are rivals.
Dokuro/Skull King
Voiced by: Kazuhiro Nakata, Rokuro Naya
He is a villain and truly evil. He is very much tempted to unmask Niyander. He wants to conquer the world and make it barren and desolated. Assisted by his monster minions and skull servants, he attempts to do so several times. As he is all bones, he can rejoin his parts even after getting scattered. He tries to possess the treasure sword but in vain. He was once defeated by Niyander and his friends. However he manages to undo the curse and started trying to conquer the power of the four magic balls. But he is trapped by these balls for good.
Chietama
Voiced by: Roco Takizawa [ ja]
He looks like an egg with two feet. He is actually the caretaker of the four magic balls. He is brave and clever and usually responsible. His name is mistaken to be ‘Chibitama’ by the Skull King several times, much to his annoyance. He admires Niyander a lot.
Mouse wizard
Voiced by: Dan Tomoyuki
He is the leader of a group of mice known as the Chu Chu Clan. He appears towards the end of the story. He attempts to turn Cat Town into Chu Chu Town as per the common principle "cats are the natural enemies of mice." Together with his mouse friends, he uses various tactics to make life of the residents of Cat Town difficult. This earns him the wrath of the residents of Cat Town. Later in the final episode, after being defeated by Niyander he reconciles with the residents of Cat Town and decides to build Chu Chu Town near Cat Town.
Ultra Maru/Miraemaru
Voiced by: Cho
He is a tiger, and is fond of eating and drinking. Although at first he sets out to outshine Niyander, he later befriends him. He believes in justice and hence helps people in trouble whenever he can, just like Niyander. To do so he wraps himself in bandages like a mummy to hide his identity, and becomes Miraemaru.
Mr. Mike
Voiced by: Yutaka Aoyama
He is an active reporter of Cat Town's main television channel, or Kamen channel. He has been a movie director too. He is in charge of several other TV programs and announces popularity rankings on a daily basis.
Kazaru
Voiced by: Miyuki Ichijo
She is a fashion designer. She is a bit dramatic at times, and has strong friendship with Pichiko and Kaberina.
Kabarina
Voiced by: Noriko Suzuki
She is a pink hippo. She is a very good ballet dancer and also teaches ballet. She lives in a small house on a lake. As she is very heavy, the ground shakes when she stamps too hard.
Pichiko
Voiced by: Roco Takizawa
She is a slender bird. Her voice is usually too high pitched and she does not sing very well. But she plays the piano and the violin excellently.
Pepe penguin
Voiced by: Miyuki Ichijo
He wants to become a master at riddles. For this he becomes a student of Dr.Hoho. Although he is a penguin he is sensitive and hates cold weather. He easily becomes ill when he undergoes panic, excitement or temperature change. He is usually silly, but has good ideas at times.
Pepeko
Voiced by: Yumi Takada
She is the little sister of Pepe penguin. She is calm and gentle. She cares for her brother just like Miko cares for Nyago.
Dr. Hoho
Voiced by: Hiroshi Naka
He is an elderly owl, and like all of them, very wise. He is good at riddles and providing any sort of information. He is extremely fond of melons.
Dekakongu
Voiced by: Yutaka Aoyama
A huge gorilla who lives in Niyon Woods. He sometimes causes uproar due to his size, but is kind-hearted and friendly.
Chibikongu
A friend of Dekakongu, and is very much like him in appearance, only smaller.
Gaeon
Voiced by: Nobuyuki Furuta [ ja]
He is a strong mountain dog who likes to travel far and wide. Due to this he is famous and therefore is a rival of Niyon. He has a good character.
Wonta
Voiced by: Noriko Suzuki
He is a young admirer of Gaeon. He is brave and loyal and wants to accompany Gaeon on his travels. He is a good friend of Con.
Paka Paka Kid
Voiced by: Kouji Ochiai, Shoto Kashii [ ja]
He is a cowboy horse, runs very fast and has an accurate aim. He befriends Gaeon later.
Kaako
Voiced by: Sayuri Sadaoka
An old woman who runs a broom shop. She is a sort of good witch. She is the only one besides the Cat Wizard who knows that Niyander and Junior Niyander are Nyago and Miko. She has her own set of brooms which can come alive and are her friends.
Ninja Harry
Voiced by: Makoto Tsumura
He is a hedgehog. He has all the qualities of a good ninja. He is a bit cocky and impatient at times, but a good person all the same.
Demonga
Voiced by: Yuki Masuda
He is a Ninja too. He is calm and clever compared to Harry. He was suspected to be a criminal at first but later proves that he was not and becomes a good friend of Niyander.
Narrator
Voiced by: Teiyu Ichiryusai
An unknown named female narrator who narrates the stories of each episodes in storytelling format.
