Satoshi "Ash" Ketchum||Neptunus Knight

Family

Hanako "Delia" and Red Ketchum (his parents), Musashi and Mio Kazama (maternal grandparents), paternal grandfather, paternal grandmother (deceased), Aunt Hillary (paternal aunt), Trey and Troy (paternal cousins), Seijūrō Akashi (second cousin), Ainosuke Shindo (third cousin), Kairi Mizuno (fourth cousin)

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Delia told her son off when he caused too much trouble, but she never forced him to focus on his studies. Ash became rebellious for the first time around the age of three. In order to keep him quiet, Delia often pretended to cry. On one occasion, Delia cried for real because she kept thinking that she was a very young mother raising a child on her own. When that happened, Ash immediately stopped making trouble. He approached Delia and asked "Mommy. What's wrong? Are you okay?" That action comforted her. She is very loving and encouraging of her son to achieve whatever goal he desires and he loves his mother and her cooking aside from often joyfully sharing his achievements with her.

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He left on another exploration shortly after Ash’s birth, leaving 19-year-old Hanako to raise him alone. Red married her fast and left her just as fast because he was an explorer. Red does send back money and letters and calls Ash occasionally. Ash doesn’t have any negative feelings towards his father because he’s following his dreams. Ash has only seen his father in some pictures or over video calls. 

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From the age of 4, he went on family vacations in Tokyo with his mother. Mio dressed Ash up in girl clothes from the ages of 4-10 so he would become more obedient as he was a very lively and naughty child, he loved playing around and causing mischief. Musashi may have forgiven Hanako for her past actions, but he still retains a bitterness towards Ash’s father for taking his only daughter away from him at a young age and not properly taking care of his family. He taught Ash everything he knew about fishing and often took him on fishing trips when he was younger.

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Red has an older sister named Hillary. Her hair is brown and short, she has green cat eyed glasses, and a picture of her nephew. Ash has twin cousins who are older than him and are the sons of Aunt Hillary. They’re blonde, their names are Trey and Troy. They are video game programmers.

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Kairi Mizuno aka Sailor Naiad

In her past life as Aqua, she was Asphaleios’s half-sister as their father was Poseidon. They met during Princess Serenity and Princess Tranquility’s 14th birthday ball. They were introduced to each other as half-siblings, talked a lot, and shared a dance. Ash is like a younger brother figure to her, and she acts like an older sister to him. Ash’s grandfather taught him and her how to fish and his grandparents told her and Satoshi stories about their youth when they were children. They both tried to catch bugs and frogs together when they were little. Sometimes they were successful, sometimes they were not. In Satoshi’s grandparents’ house, there is an image of Satoshi and Kairi as children crossdressing. They don’t think much of the fact that they are fourth cousins and simply think and refer to each other as cousins unless people ask about how they are related to each other. They do FaceTime calls with one another from time to time. She calls Satoshi by “Ash” since he prefers to be called by his nickname. Ash called her “Kai nii-chan”. He later changed how he addressed her to “Kairi nee-chan”. Satoshi was surprised to learn that Kairi was really a girl and that his mother and grandparents knew the truth but was glad that Kairi could live as a girl now. Because Ami couldn’t go to the Michiru Kaiou concert in April with her, she invited Satoshi to go with her and he enjoyed it.  She thinks of his parents as her aunt and uncle. She calls Hanako “Hanako oba-chan” and Red “Red oji-chan”. When Satoshi started living in Japan, she saw his father, Red, through a few FaceTime calls Satoshi had with his father and Satoshi told her to come say hi to him. She thinks Red is rather selfish but because she loves Satoshi a lot and understands that he is understanding of his father’s desire to go follow his dreams, she won’t voice her negative thoughts about him except around her father. Satoshi’s parents see her as a niece figure, but she has a closer relationship with Hanako. Musashi Kazama is her second cousin twice removed. She sees Satoshi’s grandparents as her grandparents. She calls Musashi “Musashi oji-chan” and Mio “Mio oba-chan”. His grandparents and mother knew the truth that Kairi was biologically female. She is impressed by Satoshi’s willingness and ability to befriend other people. She met her boyfriend, Sora, through Satoshi as they were friends. She asked Satoshi to go with her to Mugen Academy because she lied that she wanted to explore the facilities and see the celebrities, he told her they had to stop by Touou Academy first so he can bring a friend along since his friend’s sibling also goes there. They both cooperate with each other in their alter egos.

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Friends

Yue Mi aka Sailor Triton

In their previous lives, Marina bore Poseidon a son, Asphaleios. She named him after one of Poseidon's epithets meaning "Safety". Marina’s midwife was a Mercurian named Talia, Delia’s past incarnation who became Asphaleios’s godmother. Talia took Asphaleios to live with her on Mercury for a period as Marina wanted her son to learn and experience different things and she was bound to her post on Triton. However, the period he lived on Mercury was not for very long because while he enjoyed being close to the sunlight and the Mercurian races, he detested studying which Mercurians valued and he missed his mother and thought she was lonely. His dream was to become a master warrior as his half-sisters and mother were Sailor Guardians and his maternal grandfather was a Neptunian soldier. While Sailor Halimede had confronted her about allowing her son to go to the forbidden planet, Earth, using her mirror, Marina aka Sailor Triton was rather lax about it saying that Earth wasn’t explicitly forbidden to Neptunians whereas Saturn and Nemesis were taboo planets and that she couldn’t stop her son from pursuing his wanderlust and curiosity towards the planet. She also drilled him about the art of dancing. In their current lives, Ash was awestruck at how beautiful Yue was when he first saw him. Both Sailor Triton and Neptunis Knight wield tridents allowing them to collaborate while attacking and they do joint introductions while confronting the enemy. They have a mother-son relationship although Yue has no intention of replacing Ash's current mother and takes Ash out to eat at fancy restaurants when possible.

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Kimi Kaiou aka Sailor Halimede

In their previous life Halimede acted as a stern older sister to Ash. She would pinch Asphaleios’s ear, tell him that they would be going home, and head back to Triton before she would teleport back to Halimede. She would also scold him for traveling the taboo planet because humans were extremely greedy, envious of those with power, and power hungry which made them dangerous. Asphaleios would try to protest only to get his ear pinched again. Halimede eventually gave in because she knew Asphaleios was too stubborn although she was partly grateful to experience the environment of Earth. Asphaleios pestered her to give a proper explanation to her first love, a human noble, as to why she no longer came to Earth, and she asked him to give a letter to Fortunato. As she laid dying, she thanked him for being mischievous enough to allow her an excuse to go to planet Earth and she hoped that perhaps in the next life, they can live on Earth. Despite her sternness with Asphaleios and Ash, she truly does love him as a sister. Asphaleios and Ash loves her cello playing. Ash sees Kimi as an elder sister figure while Kimi sees him as a little brother figure. Ash tries to support her during the games of Shūtoku’s girls’ basketball team by being part of the audience and cheering her on. They both work together as their alter egos.

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Oki Shima aka Sailor Neso

In their previous lives, Neso assisted in serving meals to the royal family of Neptune and Asphaleios, an illegitimate son of Poseidon and Baron of Triton would sometimes be in attendance for these meals, and he would exchange his thanks to Neso. It wasn’t until a royal ball hosted by the royal family of Neptune that he told her to send his compliments to the chef and he learned that the chef was Neso’s father. When Kairi Mizuno asked the coach for a day off from practice to pick her cousin up from the airport, Oki, and the regulars of Kaijō’s girls’ basketball team were curious about him. When Oki saw his picture on Kairi’s phone, she instantly recognized him as Asphaleios from her previous life despite the differences in his current appearance. She said “Kairi-chan, on behalf of your cousin arriving to live in Japan, I’d like to invite the both of you and the rest of the team to eat at my Papa’s, Happy Island, for lunch this Sunday on the house and I’ll even throw a chocolate dessert, how does that sound?” Ash enjoyed his welcoming lunch and the dessert Kairi requested on his behalf, chocolate pudding. Even though Ash can’t cook, he likes to assist her in the kitchen by helping her prepare the ingredients by washing them or making a salad aside from being her taste tester. Once, he went on a grocery shopping trip with Oki so she could make a new dish and they talked about their travel dreams. Oki talked about traveling to South Korea and Greece. Ash encouraged her to want to go to those countries and she inspired him to want to go to those places and he said that one day, they’ll head there.

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Anastasia Romanov aka Sailor Hippocamp

In their previous lives, Anastasia was born a year after Asphaleios so they had a close bond as the youngest of Poseidon's children. When they were younger and came to Neptune Castle, after their mothers explained that they were siblings, Anastasia came up to Asphaleios and said, "Big brother, let's play." Asphaleios replied "Yeah!" She then took his hand, and they ran through the castle to play. While they were still children and they got to visit Neptune Castle, they had a habit of Anastasia taking Asphaleios' hand and running through the castle and finding fun things to do. When Anastasia became Sailor Hippocamp and had to guard her post, Asphaleios didn't see her until a ball hosted by Neptune's royal family was held and they were excited to see one another and even shared a dance. In modern days, when they cooperate in battle, Sailor Hippocamp makes teasing remarks that get Neptunus Knight riled up.

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