{Picture of what Nanami looks like. We don't own this image. All rights go to owner(s).}
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Full Name: Nanami Michishio
Name Meaning: Beauty, Beautiful, Pretty
Nickname(s): Nana-chan, Nana, Mimi, Nami, Nanami-chan, Mammie, Mummy, Nan-chan, Nanami-sama, Nanami-senpai, Nanami-san, Nanamin, Nan, Beauty, etc.
Birth Date: Unknown
Age: 14 years old
Gender: Female
Species: Human (currently); Mermaid (temporarily)
Sexuality: Straight
Personality: Kind-hearted, gentle, cheerful, honest, feisty, sweet, selfless, adventurous, confident, caring, loving, impulsive (at times), brave, serious, compassionate, hard working, stubborn, forgiving, independent, protective, motherly, free-spirited, etc.
Occupation: High School Student
Voice Actress: Asumi Nakata (Japanese); Luci Christian (English)
Alignment: Lawful Good
Power(s)/Abilities: Merfolk Physiology, Aquatic Adaptation, Cetacean/Fish Physiology, Fin Manifestation, Gill Manifestation, Scale Manifestation, Speed Swimming, Swimming Tail, Underwater Senses, Water Maneuverability, Weapon Proficiency, Trident Proficiency, Spear Proficiency, Aquatic Life Manipulation, Ichthyoid Manipulation, Aquatic Telepathy, Aquatic Empathy, Beacon Emission, Decelerated Aging/Semi-Immortality, Supernatural Beauty, Human Disguise, Multiple Heads, Musical Empathy, Music Magic, Pearl Generation (via their tears), Precognition, Siren Song, Underwater Invulnerability (Some merpeople possess inhuman durability and healing factor while in water or on land), Underwater Strength (Some merpeople possess inhuman strength while in water or on land), Water Embodiment (Merpeople like the Swedish havsfru and sjora were regarded as the spirits and rulers of their waters), Water Manipulation, Weather Manipulation, Wish Granting, etc.
Affiliation(s): Isono Junior High School
Weapon(s): Various aquatic weapons
Birthplace: Unknown
Residence: Michishio Household
Home City: Seto Inland Sea
Family Member(s): Mr. Michishio (father), Mrs. Michishio (mother), Nagasumi Michishio (older twin brother), Unnamed grandmother, Sun Seto (husband), etc.
Friends/Allies: Nagasumi Michishio (best friend), Sun Seto (male version; fiancé), Lunar Edomae (male version; ex-fiancé), The Kitten, 1/8th Figurine, Lunar's Papa, Shark Fujishiro, Maki Yuri (male version), Ren Seto, Masa Shiranui, Gozaburo Seto (formerly), Mawari Zenigata, Hideyoshi Sarutobi (Saru/Chimp), Kai Mikawa, Akeno Shiranui (male version), Iina Chiyo (male version), Maruko Okhotsk (male version), etc.
Enemies: Yoshiuo Minamoto, Yuhiteru Suruga (male version), Akeno's Superior, Saturn (male version), Maruko Okhotsk (formerly), Fuki (male version), Amano Edomae, Nagasumi and Nanami's Family, Octopus Nakajima, Maki Yuri (formerly), Gozaburo Seto, Maguro, Agitaro, Furiyo, Kai Mikawa (formerly), Akeno Shiranui (formerly), Tennōzan, etc.
Love Interest(s): Various male characters
Likes: Her brother and grandmother, her friends, music, animals, drawing, playing instruments, composing song, singing, dancing, art, cooking, helping people in difficult situations, being with her twin brother, protecting her brother, seeing the ocean, swimming, sweet foods, magic, fighting bad guys, supernatural creatures, etc.
Dislikes: Her parents, her brother and grandmother in danger, misogynistic, being locked up, being alone, her friends in danger, destruction, bad guys flirting with her, cruelty towards animals, pollution, darkness, war, murder, chaos, corrupt nobles, bullies, perverts, being underestimated, being weak, having failed, not being with her brother, etc.
Background Information: Nanami Michishio is the only daughter of Mr. and Mrs. Michishio. She is also the younger twin sister of Nagasumi Michishio and wife of Sun Seto.
Unlike her brother, Nanami is considered/treated as the perfect/golden child/special by everyone around her (most noticeably by Gozaburo Seto, Maki, and Lunar Edomae). She is also a very popular student in school, as all the guys are madly in love with her and wish of steal her away from both Sun Seto and Lunar Edomae (most noticeably Hideyoshi Sarutobi and Kai Mikawa).
However, all the girls are jealous and envy her for stealing all the boys attention and unintentionally starting a war between the factions of Lunar and Sun (as pointed out by Mawari Zenigata and the rest of the disciplinary committee). Despite this, she doesn't let that get into her head and protects her brother from the constant torment by those that dislike/hate him.
During a Family Vacation at the Seto Inland Sea, Nagasumi and Nanami both nearly drowned to death until they were saved by Sun Seto. After that, the twins and their family learned about the Seto Gang and the Mermaid/Merman Law, which states that upon learning their true identity, either the human or the mermaid must be executed.
To avoid this, it is suggested that a marriage is the best solution, so they offer up Nanami to become the bride of Sun. Since then, Nanami decided to help her brother face his fears and Nagasumi, in return, also helps his sister take on the responsibility of taking care of Sun as her husband.
Although, it doesn't make it easy on the two due to almost everyone in the Seto group (except Ren Seto (Sun's mother) and Masa) who are against their union (though obviously for different reasons). As the series progresses, however, Nanami does truly falls in love with Sun, and when she gets kidnapped and saved from the perverted noble named, Yoshiuo Minamoto by Sun, Nanami finally confesses her love to him and the two seal their love with a kiss.

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Various! My Bride is a Mermaid Series x Nagasumi's Twin Sister! Oc Insert
FanfictionJoin Nanami, twin sister of Nagasumi, as the twins find themselves in hot water after a handsome, young merman named Sun saves them from drowning. The deep-sea sweetheart's dad is a merman yakuza prone to executing anyone who learns his family's sca...