NiGHTS is a First-level Nightmaren and the primary protagonist of the NiGHTS series. NiGHTS is a playful, kind, and free spirited creature who dwells in the Night Dimension. Although created by the evil Wizeman, (s)he didn't agree with Wizeman's plans to take over Nightopia and rebelled. Thanks to an Ideya shard imbedded in his/her chest NiGHTS can dualize with a Visitor, a trick that allows him/her to escape the Ideya Palaces used to confine him/her.
Reala, a fellow 1st Level Nightmaren, and NiGHTS are equal in their acrobatic fighting abilities and both served under their creator Wizeman, but are enemies due to their opposite personalities and opinions of their master, making them heated rivals.
NiGHTS is much like Peter pan, a character created by Scottish-born English author JM Barrie. They both are capable of flight, are childlike, they never grow-up or age, and take children with them on adventures in their worlds. The only difference is that Neverland is a "real" physical place (at least in the original novel and Warner Brothers movie adaptation) while Nightopia is a dream world that exists in another dimension and can only be visited in a human's dreams or subconscious.