Catboy (Connor): A cat-like kid with super-speed and great hearing abilities. He is the leader of the trio and drives the Cat-Car. His suit is dark blue in color and has ears and a tail.
Owlette (Amaya): An owl-like girl with flying abilities and a special ability to see things from far away using her owl eyes. The second-in-command to Catboy, she is the only female member of the group and flies the Owl-Glider. Her suit is red and has an owl mask with feathered wings on her back.
Gekko (Greg): A lizard-like boy with super-strength, the ability to climb walls and ceilings, and the ability to color-change and camouflage. He is the youngest of the trio and drives the Gekko-mobile. His suit is green in color and has reptilian features.
PJ Robot: A robot with the ability to hover above the ground. He maintains HQ, acts as mission control for the team, and occasionally accompanies the heroes on missions.
Personal behavior and traits
In general, the traits for the team appears to be more serious and mature while showing individual character weaknesses and flaws, in comparison to the Pyjamasques' light-hearted and mischievous personalities.
The PJ Masks are represented as very practical superheroes such as having a compulsive mindset on being nice, show maturity, and dislikes any bad attitude that the other characters show (e.g. mockery, mean pranks, acting sneaky, berating others etc.) and will encourage others to follow their idealistic superhero traditions on acting more nicely and their own heroic standards on doing the right thing (as demonstrated in "Catboy and the Butterfly Brigade" and "Bye Bye Bad Luna").
The PJ Masks had moments of clashing with each other (including other characters on some cases). This behavior often resulted the villains getting the better of them until they realize the mistakes they made and work things out.
The PJ Masks heroic standards brought more merciful, and a lack of punishment towards the villains whatsoever, this is due that their archetype are typical superheroes instead of being a combination of a superhero and culture hero archetype like Les Pyjamasques.
In fact, they prefer to drive off any villains from performing their plan as the only priority. However, on a few occasions, they will often confiscate the villains' weapons to prevent them from using it for bad deeds.
When using tactics during their missions, the PJ Masks tend to only use their powers as the main priority on attacking the villains, and often exclude hand-to-hand combat as an additional tactic.
The PJ Masks will fight various nighttime villains from causing trouble, most of their appearances often involve the team stopping villains from stealing items.
Unlike Les Pyjamasques, it is unknown when and how the PJ Masks got formed, but it is confirmed in "HQ Tour" that their adventures on saving the day started in "Blame it on the Train, Owlette," though it might've been way earlier than that.
In "PJ Dylan," it was thought that Armadylan was an actual member of the trio, but this was resolved at the end of the episode when the PJ Masks decided that he can help them once at a while (but not as an actual member).
Their catchphrases, usually said by either Connor, Greg, or Amaya, is "PJ Masks, we're on our way. Into the night, to save the day!" or "Pyjamasques, on a un nouveau défi, les soucis, on les règle la nuit!" (in the French dub).
It is possible that when they switch at nighttime, they start thinking more like animals. They are able to trot on all four legs like an animal would, have catchphrases (and insults thrown at them) that relate to the animal they're based off of, and are able to get into poses that the animal they're based off of would be able to.
The only PJ Masks shown in the current trio that does not have a tail is Owlette and PJ Robot and this can be seen if one looks at their poses thoroughly.
According to a YouTube video from the official PJ Masks channel, the PJ Masks are all 6 years old (the description reads "Six year olds Connor, Amaya, and Greg," thus confirming Les Pyjamasques' age). The villains' ages are currently unknown, but they could be around that age as well.
Whenever their powers are activated, their costumes will glow a lighter color of their signature colors. They also usually call out the names of their powers upon activating them, but not always.
Other characters who have that similarity is Yoyo (although, his costume would no longer have the glowing feature in his later appearances).
The PJ Masks would choose to act casual, discreet and blend in from the public such as hiding or disguising their voices so that no one will know who they really are.
The PJ Masks' group name and member names were eventually adopted as nicknames for Les Pyjamasques by fans outside France, despite the PJ Masks and Les Pyjamasques being considered separate characters and group by continuity.
Some of the fans ignored the fact that PJ Robot is the "fourth PJ Mask to the team," and refer a new character they suggested to be added to the TV series as a "fourth PJ Mask" member.
Armadylan, An Yu and Newton Star are not actual members of the PJ Masks, but rather allies of the team who sometimes help them.