Kaito Momota

When he was around 16, he got a friend to make a fake ID for him to be able to sign up to be an astronaut. Even after being found out for having a fake ID, he was allowed to stay, since people liked him a lot. He passed his training and tests with flying colors, and his biggest dream is to go to space, someday. He has a big heart and cares greatly for his friends. He also used to play tennis in middle school, and is shown to be considerably muscular and athletic, albeit carefree. He likes to "train" his sidekicks, Shuichi and Maki (friends), by doing push-ups and sit-ups with them in an open field whilst he gives them motivational pep talks, despite them complaining that he does more talking than exercising.

He is also shown to be easily angered by mindsets that contrast his own, and he stubbornly refuses to believe in them. He strongly hates Kokichi's lies and unwillingness to cooperate, and his anger often clouds his judgement. He also cannot empathize with Ryoma's suicidal way of thinking, considering him a sissy and a fool, as he believes there is always a reason to live even if just small things like good food or friends. He is also notably hot-headed in general, occasionally taking action without thinking and wanting to punch others if angered enough. He can also be quite forceful when offering his support to others. He also swears, occasionally. However, Kaito himself also has trouble with weakness and appears to have a sort of complex for being the hero, not wanting to show his own weaknesses and troubles to his sidekicks even if it means lying to them as he wishes to come across as a strong figure they can lean on. He had a hard time admitting that even he can make mistakes and felt envious of Shuichi who used his detective skills to save everyone. Undoubtedly, Kaito's biggest flaw is his arbitrary complete trust in others, which is often misguided. He is sincere and believes in friendship no matter what, trusting who he wants to trust even against all evidence and logic. He believes Maki without questions despite evidence against her, with his only reason being "an official hunch from Kaito Momota, the Luminary of the Stars himself", causing other students to call him an idiot because of it. He hates to be called an idiot, claiming that it hurts his feelings. Kaito can also be slightly comical, sometimes having very over exaggerated expressions and reactions, and can easily come across as not that smart due to his beliefs and occasional silly behavior such as eating way too much food at one point due to feeling pumped up. However, despite some of his comical traits, Kaito is actually very intelligent and talented in various ways as he is an astronaut trainee.

Kaito is an energetic person with a passionate heart, who lives for dreams and romance, and tends to give somewhat dramatic encouraging speeches for others. He believes you need to take risks for the sake of your dreams and shouldn't limit yourself nor ever give up. Due to his clichéd hot-blooded spirit and his document falsification he could pass the astronaut examination, proving that he is smart. Being the Ultimate Astronaut, he harbors a dream and a great longing to go to space, and already considers himself a space legend. He often refers to himself as "The Luminary of the Stars" and talks about the Universe being on his side. Furthermore, he talks about being popular with women and children, and he thinks that his goatee gives him a "glamorous celebrity vibe". Kaito described himself as a passionate protagonist of his own story who would help the others to survive the killing game. He considers himself a hero type, and occasionally offers to make other people his "sidekicks". Because of that, Kaito always tries his best to unite the group, and he 'is very much a reliable older brother type of character. He is very loyal to his friends and always there in order to aid them. Kaito has the ability to draw people to him, and he has been described as an interesting and amusing person. While he is excited to look at the dirty books in the library as he thinks it's something guys would normally do, there has also been a moment in which the conversation topic was girls and peeping, and he appeared to become completely distracted and forgot the original topic and instead begun to talk dramatically about man's passion for exploring unknown worlds, claiming it is true man's passion. His obliviousness to romance and sexual matters has also been shown in the way he appeared oblivious when the other students more or less jokingly talked about Shuichi being a masochist. Kaito seems to be a good judge of character and can give correct advice at times.

Kaito is a 6'0, young man with gel-spiked purple hair that's grown out both at the top and bottom of his head, that Kodaka describes as a space jet coming out of a black hole and a short goatee. His eyes are a warm lilac, and he has fairly long eyelashes. He also has a slightly tanned complexion.

Kaito wears a white t-shirt kumadori design stamped on it, on top of that he wears a long sleeved dress shirt with a breast pocket. On this shirt are black buttons which are currently not in use. On top of that, he wears a long, purple blazer with a galaxy design on the inside of it. However, his coat is worn improperly at all times, instead, Kaito wears his left sleeve and leaves the right side of the coat to drape over his shoulder to leave it fluttering to show the space design.[8]

He wears purple pants matching the color of his blazer that are rolled up over his ankles. Kaito wears slippers with the same galaxy design on them.