Cosmo

Lunar first came across as childish and naïve, blindly following Eclipse's orders in the beginning. However, this changed as time went on, as Lunar revealed to Monty in an episode that he was aware of Eclipse's manipulation. He's one of the most emotionally aware characters of the series as he matured more during the October arc and stood up to Eclipse. Despite being labelled as idiotic, Lunar has shown intelligence but not in the way that Moon and Eclipse have intelligence, like him pretending to be working with Eclipse, all the while working with Monty to build a body for BloodMoon to take down Eclipse and managed to get away with it for weeks without being caught. Though despite his childish nature, they still could be sinister and threatening when they wanted to be, as shown by the threats he directed towards Monty before their redemption. He has also been shown to be quite the actor, being able to act like Moon for an entire week without getting caught.

Despite their positive attitude, they are traumatized and have been shown to have panic attacks in situations that remind them of Eclipse. In these times Lunar would describe feeling small which would even cause his appearance to shift depending on their mental state. He's very good with children and has been said to enjoy the kids' company. Essentially being a child himself however we are not told what the people or the kids are told about him. One big trait of theirs is how they are quite family orientated, most of his actions being driven by family-related reasons. For example, helping Eclipse because they are siblings or helping BloodMoon in hopes of having a better brother who cared for him. They are quite anxious about disappointing those they consider family, even playing a game that they did not want to play just because Sun had asked them to. He is also anxious to interact with the other animatronics due to their past actions and his regrets in helping Eclipse, but he has interacted with a few of them in passing moments. He has had a big influence not just on Our Sun and Moon and Monty but also on Solar and a Monty from another universe where Eclipse had won.

After being brought back, Lunar has stated many times that they feel numb and has said many concerning things, even attempting to suffocate themselves at one point. However, this may have just been him attempting to scare people watching him. However, thanks to the channel he started with his sister. He has now learnt to deal with his emotions as well is being reunited with Solar, although because of Solar's new appearance at first Lunar would be scared of him, but the two of them have sent grown their bond again as Lunar has been seen to spend a lot of time with Solar.

Appearance: After being repaired by the AI in Monty's space station, he was given yet another new body—this time, he is stuck with its appearance as he can no longer change forms (though he can change his height and turn invisible). His model is much shorter than Sun and Moon's. The left half of his faceplate is a pastel lilac color, while the other side is a darker shade. The right side of his shirt matches the shade of the left side of his face, and the left side of his shirt matches the shade of the right side of his face. His sleeves are a pastel lilac color, with the top half being the darker lilac shade, and two small, thin lilac stripes on the bottom half. His gloves and shoes are a dark lilac-blue color. His hat is cyan with yellow crescent moons on it, and the rim of his hat is white, connecting to a white neckpiece with a yellow stripe and a bell. His pants are white with yellow stripes and puff up at the botto