The eponymous character of the series, NiGHTS is a carefree, mysterious being that flies around the world of dreams. S/he's interested in anything new and unusual, including Visitors, and tends to do hir own thing, for the most part. NiGHTS has a tendency to be unthinkingly rude, especially towards Owl, but s/he generally acts in fun, and means no harm.
- The Ace: By the end of both games, s/he's managed to defeat all of Wizeman's forces and is capable of fighting Wizeman on equal terms.
- All-Loving Hero: S/He'd have to be to be a Nightmaren and still be heroic.
- Ambiguous Gender
- And Then John Was a Zombie: Averted
- Attention Deficit... Ooh, Shiny!: Look! It's Octopaw!
- Beware the Nice Ones: Possibly. S/He's never seen to lose his/her temper, but s/he also has no problem with killing his/her enemies if s/he's pushed too far.
- Starkly evident in the Reala fight in Journey Of Dreams- NiGHTS basically snaps at Reala, picks a fight, and then proceeds to beat Reala up so badly that the other Nightmaren is forced to retreat.
- Big Brother Mentor: A bit more like this to Will and Helen than Elliot and Claris. Understandable, as Will and Helen seem younger, while Claris and Elliot seem to be adolescents.
- Chronic Hero Syndrome
- Disney Death
- Fake Brit: In the sequel.
- The Fool
- Friendly Enemy: Usually acts like this toward Reala.
- Heel-Face Turn: Before the series started.
- Hellish Pupils: Both NiGHTS and Reala are subtly cat-eyed.
- He's Back: At the end of Journey of Dreams, possibly.
- Idiot Ball: Mostly in the sequel, where s/he is constantly being captured.
- Trickster Archetype
- Villainous Harlequin: Pre-series, possibly.
An aspiring singer with a serious case of stage fright, Claris finds her way into Nightopia after a disastrous audition.Elliot Edwards
A friendly, popular boy who loses confidence in himself after the local Jerk Jock
and his friends push him around. He then finds his way into Nightopia...Helen Cartwright
A child prodigy who is gifted at playing the violin. She's very close to her mother, and finds herself in the Night Dimension when she begins to have nightmares out of guilt for sacrificing her time with her mother for her social life.William Taylor
A lonely boy whose favorite hobby is soccer. He's very close to his father, so when the man leaves for a business trip, Will's loneliness leads to nightmares. It's after this he finds his way to the Night Dimension.Owl
An elderly, owl-like Nightopian, he serves as a guide to both Helen and Will throughout Journey of Dreams
. He panics easily in bad situations and is irritated by NiGHTS' childish antics.
The ruler and creator of Nightmare. Wizeman created the Nightmaren as well. He seeks to rule over the Night Dimension (and the waking world in the US version of NiGHTS into Dreams
) and is especially interested in corrupting Nightopia.
- A God Am I: Granted, he is implied to be a god, but that doesn't stop him from acting out this trope.
- As Long as There Is Evil: Ties directly into his Type I Immortality, being the seeming source of it.
- Big Bad
- The Blank: His face seems to be totally blank, save for something that could be a mouth.
- Card-Carrying Villain
- Evil Sounds Deep: In Journey of Dreams.
- Eyes Do Not Belong There: In each palm of his hand there is a red eye. Most prominently in the cutscene following Donbalon's defeat.
- God Is Evil: He's really the only character implied to be a god, and being able to create Nightmare and the Nightmarens certainly attests to that. The evil part comes with his being the Big Bad.
- Immortality: Type I. It doesn't stop him from being destroyed in the good ending of Journey of Dreams, however. Or does it?
- Was Once a Man: His backstory states that he was a Visitor who was deprived of his Ideya.
- You Have Failed Me: He tends to pull this a lot on second-level Nightmaren, and even threatens to do this to Reala.
NiGHTS' rival. Unlike NiGHTS, he's cruel and insidious, willing to do just about anything to get what he wants. He is completely loyal to Wizeman and is constantly out on missions from him.Jackle
A second-level Nightmaren created by Wizeman. He appears as a body-less hood with gloves and boots. Only appears in the first game.Gulpo
A rather harmless fish Nightmaren that swims around in a giant glass tank. The first boss of the first game.Puffy
A fat, round, bouncing, pink rabbit-like Nightmaren that apparently can sing opera.Gillwing
An odd Nightmaren that looks like a cross between a frog, bat, and dragon. One of few re-occurring bosses, appearing in Christmas Nights.Klawz
An ever-grinning cat Nightmaren that jumps around a horizontal, ferris wheel-like contraption on exploding mice.Donbalon
A clown Nightmaren that bounces around like a large balloon, hence the name. first boss of the second game.Girania
A Giant fish Nightmaren, clad in knight-like armor. Has a thin mustache, and a penchant for eating its enemies. Sinks into the ground to avoid them as well.Bomamba
A witch nightmaren who fights on top of a tiltable table. Fights by firing blasts, and using her cat familiars as rocket projectiles.Cerberus
A vicious dog Nightmaren that appears to be three orbs with dog-like auras, bond to each other by chains.
- Hellhound: That mad old dog. Even the other Nightmarens fear this creature.
An odd chameleon magician Nightmaren that wears a stage magician's tuxedo, top hat, and cape. Seems to drag opponents into its own realm, and uses playing cards to fight for him.Queen Bella
A giant spider Nightmaren, dressed like a British queen. Fought above a lava-filled hole on grate platforms. Seemingly likes to spin silk balls for no reason.