"I'm Luna, the smoothest operator! I'm Luna, the capable gal!"
Luna is one of the former residents of the American colony.
Always wishing for an intelligent boyfriend, she becomes enamoured with Senku's smarts and character; shifting allegiance to Kingdom of Science and in turn getting the chance to date the young scientist.
Luna is a slender young woman of average height who has somewhat wild, short strawberry pink hair with a few locks long enough to cover her left eye, similar to Ginro. She has a small bust but extremely wide hips and is considered to be very attractive by Carlos, Max, Mozu, and several others.
For clothing she wears a striped, form-fitting short backless dress and a choker with a star on it. She also has a pouch wrapped around her left thigh and a pair of thigh-high boots with heels. Her petrification scar takes the form of a star-shape on her lower back.
Not much is known about her, though she is shown to be quite timid.
Luna seems to have a disposition against murder as she questioned Stanley if he was really going to kill someone. However, she was silenced with the glare from him and proceeded to support him in his endeavor. Even when given a perfect opportunity to get a clear shot, she went so far as to making herself look like a fool to divert Stanley's signal.
A hopeless romantic, Luna often fantasizes of marrying and living an easy life, a habit she had even before her petrification. She later mentioned that her type of man is an intelligent hard working man with conviction to match. True to word, while she believed Taiju to be their head scientist, she didn't feel attracted to him but instead felt attracted to Senku.
Despite being asked to find out which passenger was Dr. Taiju, she came up with a romanticized version of him that didn't fit him and didn't notice he wasn't the scientist after interacting with Senku, who made no qualms of hiding his intelligence when he used science to make soft serve ice cream to tempt her. However, she has slowly become suspicious of him after hearing of his association with Xeno. After she officially learns Senku is the scientist, Luna helped in tending to his wounds and asked him to be her boyfriend.
While Luna often comes off as snobbish and air-headed due to coming from a wealthy and influential family, she is not one to rest on her laurels and prefers to earn her place. She is shown to have great persistence keeping herself awake for thousands of years and displayed great diligence in her medical school studies, even repeating courses she failed instead of bowing out.
Prior to the petrification event, Luna appeared to have been an heiress and was always tended to by Carlos and Max. Back in the day before the science expo, she became a student for medical department thanks to her father’s connection, despite the lessons being sometimes difficult to her, but it paid off. One day at a science expo, Luna was petrified along with the rest of humanity. Luna retained consciousness by refusing to die single and persisted for over thousands of years. 
After her revival, Luna at some point became an employee of Dr. Xeno.
Luna accompanied Stanley along with Carlos and Max through the forest. Luna questioned Stanley on whether they should trust Gen Asagiri but Stanley explains his mistrust of Gen, something Luna hurriedly agrees on. Luna then deals with Carlos and Max, shrugging off their advances before Stanley tells her that she has to preserve her strength because she has a role to play. Luna is obviously confused but continues to journey with Stanley. After gathering a good vantage point, she catches a glimpse of the Perseus and remarked that the science leader is nothing to Xeno. Luna questions Stanley if he really intends to kill the leader in Stanley confirms it was glaring at Luna when she tries to question him on why. Moving the questions further, she asks why he needs her. Stanley explains that he will send Luna to spy on the Kingdom of Science to draw out the science user for him to snipe him. Luna hesitantly agrees and gets her self battered up, to give the illusion that she needs help. Luna then makes her presence known to the crew, begging for after escaping Xeno before Senku approaches her and helps her. She is seemingly awestruck to look at him while the rest of the crew observe the scene.
Now on the Perseus, Luna started to work out who the Scientist is. Luna notes to herself on what type of man he is, believing that he might be an intelligent hard working man with conviction to match, her exact preference. Luna then eliminates a few candidates out before Yuzuriha casually says Taiju's name and the latter reveals himself. Luna is flabbergasted to find Taiju, who is not what she expected of a head scientist. However, she begins to ponder how to lure him for Stanley to eliminate. As she does, she realizes that she didn't feel attracted to him but instead felt attracted to Senku whose nature surprises her and he makes no qualms of hiding his intelligence like when he used science to make soft serve ice cream to tempt her. Luna is surprised and states if Xeno was present he would say the word "Elegant". She's particularly shocked when Senku reveals that Xeno was his science mentor. 
Pondering on Senku's past association with Xeno means, Luna notes on her possible attraction to Senku and attempts to eavesdrop on his conversation with the others. However, Taiju's yelling makes her recall her goal of having him assassinated. She tries to signal Stanley but after hesitating for a while she is unable to because of the kindness the crew showed her. Luna then decides to notify her comrades of Senku having a connection to Xeno.
When the crew is thrown into disarray after Ryusui revealed a sniper, Luna is worried that the plan fell through before looking into the direction of Stanley unknowingly causing Senku to give away his identity when he looks. 
After Senku is wounded from the aftershock of the shot, Luna wonders what she has to do now at the mission have been a success. Luna remarks on a quick thinking of Senku, after he created a bullet proof vest. Luna recalls her time in the medical class and remembers the basics, easily diagnosing Senku. The crew believe that she might be a doctor but Luna states that’s not the case though Taiju begs her to help his friend and she agrees. 
Luna remained on the Perseus where she tended to the wounds of Senku.
Luna continues her work and noted to herself that her impression on Senku was accurate because the scientist was confirmed to be him. After he wakes up he tells her what she needs to do to heal him though some of his methods worry her, she agrees. Luna then states that there is only one condition he has to agree to: being her boyfriend. Using Morse code, Luna contacts Carlos and tells some of the good news, much to his dismay. Sometime at the bar Luna is talking to François about her recent relationship and she becomes dismayed when she hears that Senku was briefly married and used it to further his goals. They also speculate that he's doing the same thing with his relationship with her. 
When Senku and Ryusui engage Stanley in an aerial battle, Luna frantically wonders why Senku was in the plane, despite his injuries.
Sometime later, the Perseus comes under attack by Stanley's unit and they capture most of the crew. Luna, in particular is held captive by one who taunts her situation. 
Afterwards, Luna is freed by Max after she informs of the situation. She is able to get him to bring Francois and Kaseki too. The group arrive at the Castle, where Luna finds Senku and Ryusui have arrived too. She is bashful at seeing him before complimenting him on surviving the plane battle. She imagined being praised, though recalls the words she has heard of Senku and expects to be ignored but is surprised when he does express amazement at her skill. She sides with Senku and joins his group in that his former pupil survived. He shares some words with his former apprentice, before Xeno tells him that he is already lost the commandeering a boat. Afterwards, she watches Senku and his group discuss how there's someone in the American colony who most likely would not want to see blood shed in contact Dr. Brody. Luna watches Brody being uninterested in a truce until Senku makes him an offer. Luna is greatly shocked when Senku reveals the ingredients to the revival formula. 
South America Arc
Luna continued traveling with her new allies on the new ship. 
Soon they disembarked on an island to gather fuel supplies. Luna became exhausted at the intense labor, though denies it to Max. She and the others were later surprised by Taiju showing symbols in the sky, Luna scared at the thought. They investigate and find Dr. Chelsea, an associate of Xeno who revived later than the American Colony. Luna is dismayed that her instincts and survival methods led her to go opposite of the Colony.
|Male||Dr. Brody • Carlos • Max • Stanley Snyder • Dr. Xeno|
|Female||Charlotte • Luna • Maya|