An Exceed from Edolas who happens to be Ichiya's counterpart as well as Extalia's captain of the Imperial Guard.
Nichiya's origin story is not revealed. There are no flashbacks or anybody's words about him.
Nichiya, who is created by Hiro Mashima, has no information regarding any inspiration used to create him. However, his personalities are based on his Earthland counterpart, Ichiya, in the same series, Fairy Tail. Also, he has the same Seiyuu, Show Hayami. He first appears in Fairy Tail volume 21 and episode 83.
Nichiya and Nady appear to greet Happy and Charle at the castle. When Charle realizes that she betrays Wendy, Nichiya and Nady states that she was following orders of the queen. Happy tells them that they are not their puppets. Once Happy and Charle escapes, Nichiya and the Exceeds chase them. Happy and Charle gives Nichiya and his soldiers the slip. Later, Happy and Charle are heading to Edolas, and Nichiya and the Exceeds are pursuing them. As Nichiya and the Exceeds are in the royal court, Faust has the soldiers turn them into a giant cat lacrima.
Later when Natsu and the gang defeat Faust's Droma Anim, Nichiya and his soldiers are suck into the reverse Anima. In Earthland, Nichiya and Nady apologizes to Charle for taking advantage of her precognition skills. Moments later, Nichiya sniffs Erza's "parfum" and tells her that she has a nice "parfum." He and the Exceeds leave to find the 98 children that were sent to Earthland, six years ago.
Like all the Exceeds, Nichiya can soar in the sky by using his magic.
In volume 24: chapter 198, Nichiya sniffs Erza's parfum without getting hit, but in the anime (episode 95), Erza hits him for sniffing her.