Isana (伊佐奈 Isana) is the director of the Ushimitsudoki Aquarium. He's known of his so what calm behavior against his animals and peoples that visit his aquarium. He has the cursed body possession of a sperm whale. Hana is wondering how is still able to transform into a complete whale after returning huge pieces back from his original body.


He has black hair and wears a helmet. He has neat clothes and a jacket from his whale form. He wears earrings and rings an wristwatch and a bracelet around his arm. He probably has black or blue eyes. When his helmet was worn and fell off, it revealed half of his face was part whale. When he transform, he resembles that of a sperm whale.



Isana's other face

He's a very brute person, he's only kind to important ones. What he doesn't know is that every fish in the aquarium is afraid of him because of his whale powers. He can manipulate his executive members easily. He always wears a helmet to hide his other side for others, but opens it when he eats or someone is trying to pull him off the limit. He likes bad guys because he can destroy them easily with his cursed form. During the short battle between Shiina and him, he tells him that they are in the same boat cause of them cursed forms. He has no mercy to anyone he kills. He is able to completely transform back into a whale, but his condition and the way how he's able to use it is unknown. Seeing between a battle during Shiina he has a little bit trouble of swallowing an enemy. He also likes money.


Curse of the WhaleEdit

He was on a cruise with some friends while suddenly seeing a whale. He showed his gun and tried to shoot that whale, while suddenly from behind a Ghost Whale made his appearance and cursed him into a shape of a whale.


Vs. Aquarium ArcEdit

Main article: Vs. Aquarium Arc

Isana was seeing sitting on his Manta Ray saying to Sakamata if he does't wish to die he suggested him to work at the point where he's about to drop dead. Later Isana enters the meeting with his underlings vassals saying that it was a long time that he opened his aquarium for business. He says also that the animals that he has were been assembles as the strongest creatures on which he can count on the board of directors. He then tells about the curse that awkwardness him to change the animals with his "Magical Powers" saying that these magical powers are vanishing little by little from his body and when they are gone he's going to say completely farewell to his vassals. Fuka then talks but Isana crushed him with his Whale powers because he were been mad at Sakamata about that he's number 2 and he isn't. After that he crushed him he then says that he must gonna think twice before he's saying stuff like that. Isana then starts to talk to Sakamata abut Igarashi about that he can't transform him back to his original shape with his magical powers. He then sees that there is another with Magical Powers, he then wishes to see him.

Abilities and PowersEdit

  • Echolocation: is also known as a Biosonar, it's a technique showed by Sakamata and Isana. It is a normal sonar used by toothed animals and dolphins, but it can also used by bats, cave swiftlets and Oilbirds. The technique is showed as a click sound that should seal another animal from preventing a move.
  • Small Fish (雑魚(ザコ)):


  • His name comes from the ancient Japanese word for whale, isana (勇魚, いさな).
  • A common shorthand of his is "137".
Ushimitsudoki Aquarium
Director: Isana
Animals: DevilfishDholakFukaIkkakuKaizouSakamataTekka MakiTsubo

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