Yamami Tsurumisaki (鶴御崎 山海, Tsurumisaki Yamami) is a junior of Class 13 and a former member of the Flask Plan's Plus Six. His project name is Star Master (占領役者, Sutā Masutā).


Tsurumisaki hates being around Normals and even compares them to garbage, a sentiment shared by his fellow member of the Plus Six, Shoko Kamimine.[1] Like the rest of the Plus Six, he adds "Let's try and get along." after his introduction.[2] Like the other members of the Plus Six, he is considered a basis for Class -13, having a personality that separated him even from other Abnormals.[3]


Tsurumisaki has combed, light green hair (blonde in the anime), and the left side of his face is gray in color. He wears formal gray clothing (light brown in the anime) with a green tie (black in the anime).


Tsurumisaki, along with the other members of the Plus Six, are unknown to Maguro Kurokami, indicating that they did not become a part of the Flask Plan until after he left.[4]


Thirteen Party Arc

The Plus Six arrive in the elevator

The Plus Six arrive.

The group first appear before Youka Naze and Itami Koga after they kidnap Medaka Kurokami, offering to slow down the Student Council while Oudo Miyakonojou brainwashes her.[5] Afterwards, the group rides the elevator to the first floor.[6] Tsurumisaki introduces himself along with the others.[7] After the Student Council head to the stairs, Tsurumisaki agrees with Otome Yunomae's suggestion to follow after defeating the Loser Team.[8] The Plus Six are engaged by the Loser Team so that the Student Council can head down to the lower floors.[9] After Kamimine protects the Plus Six, Tsurumisaki in turn protects her from Myouga Unzen, catching her weapons and melting them with his fingers. He remarks that if she wants to bowl, he will go with her, though his average is under seventy. He is himself protect by Yunomae.[10] While Medaka and company prepare to descend to the thirteenth floor, Tsurumisaki and the others are still fighting the Loser Team. Tsurumisaki continues to fight Myouga.[11] Later, he, along with the rest of the Plus Six and the Loser Team, is defeated by Misogi Kumagawa.[12]

Kumagawa Incident Arc

Following the battle, Tsurumisaki is sent to the hospital along with the rest of Kumagawa's victims. Instead of external wounds, those who got pierced through with the giant screws took severe mental damage.[13] On August twenty-second, Tsurumisaki is among Medaka's former enemies who show up to cheer for her during the President's Battle.[14] He cheers for Medaka with her victory.[15]

Kurokami Medaka's Successor Arc

Bouquet Toss To The Future Arc

The entirety of the Thirteen Party await Medaka in Class 13's homeroom, to challenge her as part of the 100 Flowers Run.[16] His message to Medaka is to ask if she likes bowling.[17]


Tsurumisaki's melting ability

Tsurumisaki's melting ability.

Superhuman Physiology: Tsurumisaki is one of the only members of the Flask Plan who can use the elevator in Hakoniwa Academy's underground facility, along with Myouri Unzen and the other members of the Plus Six.[18] He also claims to be a very poor bowler.[19]


Superhuman Body Temperature: Tsurumisaki's Abnormality has not yet been fully identified, but he seems to be able to capable of melting metal with his fingers.[20]


Anime Opening Tsurumisaki

Opening Tsurumisaki.

  • When translated from kanji, Star Master means The Actor with the Room to Himself.
  • In the anime's opening sequence, the left side of Tsurumisaki's face is colored the same as the rest of his face; skin-colored instead of gray. The line running down the side of his face however remains unchanged.
  • Tsurumisaki is in charge of the eighth basement floor of the Clock Tower, a grand theatre.[21] This is likely the source of his Project Name.


  1. Medaka Box manga; Chapter 44, page 15
  2. Medaka Box manga; Chapter 45, page 16
  3. Medaka Box manga; Chapter 64, page 13
  4. Medaka Box manga; Chapter 45, page 15
  5. Medaka Box manga; Chapter 44, pages 14-15
  6. Medaka Box manga; Chapter 45, page 14
  7. Medaka Box manga; Chapter 45, page 16
  8. Medaka Box manga; Chapter 45, page 14
  9. Medaka Box manga; Chapter 46, page 1
  10. Medaka Box manga; Chapter 46, pages 5-8
  11. Medaka Box Abnormal anime; Episode 11
  12. Medaka Box manga; Chapter 55, pages 14-15
  13. Medaka Box manga; Chapter 58, page 1
  14. Medaka Box manga; Chapter 91, pages 9-11
  15. Medaka Box manga; Chapter 92, page 2
  16. Medaka Box manga; Chapter 188, page 6
  17. Medaka Box manga; Chapter 190, pages 4-5
  18. Medaka Box manga; Chapter 45, page 13
  19. Medaka Box manga; Chapter 46, page 7
  20. Medaka Box manga; Chapter 46, pages 6-7
  21. Medaka Box manga; Volume 6, page 126