157 cm (5'1")
Nai Muhinyi (无) is the main character of the story.
Nai is a petite young boy (his age unconfirmed) with large, reddish eyes, and pale features. He has short, white hair- somewhat resembling an albino. The two tips from his hair, which are sticking out above his ears are lavender.
It's confirmed that Nai is an animal, a Niji. However, he is only part Niji and was made that way by Karoku.
Nai is very kind and innocent, albeit quite naïve. Due to his dependence on Karoku, he tends to rely on those around him who are willing to lend him help- often getting him into trouble.
Nai does not know much about the world around him and is confused by very simple terms- not understanding the compliments he often receives due to his unworldliness. When Gareki first found him, he did know what blood was, referring to it as "red water". Despite this, he is also quite brave, as he dove to save an endangered animal and defended Karoku when they were attacked alone.
Nai is an all around pure, and innocent character. Eager to help, and incredibly loyal to those he calls his "friends".
Gareki and Nai have a very close relationship, both showing great care and concern for each other. This is shown when Gareki protects and provides for Nai even though they had just met. Nai also shows that he cares for Gareki when he tries to distance himself from him because Karoku asked him, "You don't want him to break, do you?" Because of this, Nai ended up pushing Gareki away in order to protect him. Gareki, not knowing Nai's true intentions, reacted negatively to this which resulted in Nai breaking out into an outburst of tears. However, the conflict was later resolved and Gareki and Nai are able to become close again.
Yogi and Nai are good friends, due to Yogi's childish and bubbly personality he makes a wonderful playmate for Nai. Yogi also protects Nai from any potential threats/danger.
- Due to the fact that Nai is a Niji/human hybrid, his ears are incredibly sensitive to sound, giving him the ability to hear noises that are deemed inaudible to others.
He claims to have always been living with a man named Karoku in a forest near Karasuna. When Karoku does not appear one day, Nai ventures outside and finds a trail of blood leading from their home to the sea, and a left-behind bracelet (Circus I.D.).
- His name means nothing or not existing in Japanese.
|Circus||Nai • Gareki • Yogi • Tsukumo • Hirato • Kiichi • Jiki • Tsukitachi • Iva • Karoku Arumerita|
|Kafka||Uro • Palnedo • Karoku|
|Research Tower||Akari • Ryoushi • Azana • Murano • Isosa • Tamon|
|Kuronomei Academy||Tsubame • Ranji • Shishi • Sesiri|
|Varuga||Mine • Derumen • Nima • Meiga • Kagiri • Kiharu|
|Defense System||Hitsuji • Usagi • Yukkin|
|Other||Erishuka • Yotaka • Tsubaki • Jingu • Kana • Tokitatsu • Kiripon • Yanari • Rissun|