Tatsumiya

Tatsumiya (竜宮) is a humanoid oarfish from Wadanohara and the Great Blue Sea. She is one of the employees of Uomihime's court and serves as a foster mother to Wadanohara after the Great Sorcerer's disappearance. She was one of Meikai's familiars.

Physical Description
Her white hair is cut into a short himecut, with red accents visible in the middle of her bangs and at the sides of her face. Two long red antennae extend from the top of her head. Her eyes are yellow-orange with black pupils. She also has red nails.

Tatsumiya wears a white furisode accented with gray markings and red trim, the end of the long sleeves have red decoration on the tips, and tied with a red obi. Her obijime is yellow and decorated with a white fish. She also wears a pink obi-age.

In her past appearance, her hair in front was the same, but in the back it was much longer. She wore a dark red kimono with lighter red gradient sleeves, the neck piece was a duller red, and she wore an obi that was the exact same as her current one, except the fish on it had its eye open. In the manga, however, her furisode is decorated with a variety of flowers.

Personality
Tatsumiya is kind and caring, possessing a motherly personality. She takes care of Wadanohara in place of Meikai and cares for Wadanohara as if she were her daughter. She worries over Wadanohara, being one of the few to recognize the witch's flaws and problems.

Tatsumiya's favorite color is ultramarine. Her favorite food is sweet bean jelly, candy, and Star Candy.

She is very loyal to Meikai, often referring to him as "Lord Meikai." Even after his death, she continued to serve him by caring for his daughter. Hidden from others, she still misses her master, wondering what truly happened to him after he sacrificed himself to seal the Sea of Death away.

Background
Tatsumiya was Meikai's familiar and the one Meikai had chosen to wield the Sacred Sword. She remained as his familiar up until his supposed death. In the past, she had longer hair and wore a red kimono instead of a white one.

Moments prior to his death, Meikai entrusted the care of his daughter Wadanohara to her. Respecting her master's wishes, Tatsumiya filled the role of parent for Wadanohara in place of her absent father and mother. It was she who taught Wadanohara all of the magic she knows, Tatsumiya passing down to Wadanohara the magic her father used.

Minor

 * Wadanohara and the Great Blue Sea - Minor Character

Wadanohara
Wadanohara is Tatsumiya's foster daughter, Tatsumiya having taught her all the magic she knows. She cares and loves Wadanohara, carrying out the wishes of her deceased master. Tatsumiya frets over her foster daughter often, worrying about her health and problems. In turn, Wadanohara loves Tatsumiya as her parent, worrying over her well being and health.

Meikai
Meikai was Tatsumiya's former master, who entrusted her to take care of his daughter, Wadanohara, moments before his death. Tatsumiya greatly respects and cares deeply for her former master, continuing to refer to herself as his familiar even after his death. She also continues to grieve for Meikai, centuries after his death, as she often expresses sorrow when alone over his passing.

In Deep-Sea Prisoner's high school alternative universe (Funamusea Private Deep-Sea Academy), Meikai is still alive and Tatsumiya works as a subordinate of his at a company. They often go out drinking on their way home from work together with Old.

Old
Old was Tatsumiya's former fellow familiar. In the past, an altercation between her and Old ended with Old possessing noticeable scars that were made through the usage of the Sacred Sword. Old seeks revenge on her for disfiguring his face and for having been the chosen one instead of him.

In Deep-Sea Prisoner's high school alternative universe (Funamusea Private Deep-Sea Academy),Old and Tatsumiya are on good terms. They work together at the same company as subordinates of Meikai. The three of them often go out drinking on their way home from work.

Helica & Pulmo
Helica and Pulmo are Tatsumiya's fellow employees of the Uomihime's court. They are on good terms. Not much else is currently known about their relationship to Tatsumiya.

Syakesan
Syakesan is Tatsumiya's former fellow employee of the Uomihime's court.

Idate
Idate is Tatsumiya's acquaintance. He saved her from Old. It is implied that Tatsumiya has a crush on him. It has been stated that since Tatsumiya is very gentle, Idate would treat her in a gentlemanly manner.

Skillset

 * Magic - Tatsumiya's specialty is magic.
 * Singing - She can sing.
 * Dancing - Though a secret to most, Tatsumiya likes to dance.

Natural Abilities

 * Nigh-Absolute Immortality - Like all non-human characters in the Deep-Sea Prisoner Universe, Tatsumiya cannot die from natural causes such as aging or disease.
 * Underwater Breathing - Being an oarfish, she can naturally breathe underwater.

Trivia

 * "Tatsumiya" means "dragon palace."
 * In response to a fan's comment on a livestream, Deep-Sea Prisoner mentioned that Tatsumiya is one of her favorite characters. Deep-Sea Prisoner designed her to be instantly recognizable as a messenger of Ryūgū-jō from the folktale Urashima Tarō. She was also designed to have the image of a widow.

Funamusea's Private Deep-Sea Academy
Translated by Yao, typeset by Jo.

Quotes

 * "..... Lord Meikai. Just where have you gone off to...? I.......... Did you simply vanish? Lord Meikai..... .....Are you no longer anywhere to be found?" (Wadanohara and the Great Blue Sea Bonus Room)