Character Relationship Map: Blue Giant

Characters

• Dai Miyamoto (played by Yuki Yamada) — protagonist

  A high school student from Sendai who becomes fascinated by jazz after hearing a song. He works part-time to buy a saxophone, then practices every day and learns through classes with Yui. His brother...

• Yukinori Sawabe (played by Shotaro Mamiya) — protagonist
• Shunji Tamada (played by Amane Okayama) — supporting
• Ayaka Miyamoto (played by Mirei Suda) — supporting

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Dai Miyamoto → Ayaka Miyamoto (Family Siblings) — Ayaka supports Dai's move to Tokyo by sending him off with food.

  Dai leaves for Tokyo carrying food from his sister, Ayaka.

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Yukinori Sawabe → Shunji Tamada (Alliance Bandmates) — As members of JASS, they support Shunji through his early struggles as a drummer and encourage him to keep practicing.

  Yukinori and Shunji join Dai in forming JASS, and both encourage Shunji to continue after he is discouraged by his mistakes.

• Dai Miyamoto → Yukinori Sawabe (Alliance Musical Partners) — They build JASS together; Yukinori helps Dai understand that improvisation needs a musical framework, while Dai encourages Yukinori when he worries about repetitive solos.

  Dai meets Yukinori, and the two begin playing together. They agree that they need a drummer to complete their sound.

• Dai Miyamoto → Shunji Tamada (Social Old Friends) — Shunji gives Dai a place in his apartment, then joins Dai and Yukinori in JASS despite being inexperienced on drums.

  Dai turns to his old friend Shunji for a place to stay when he arrives in Tokyo.

Story Analysis

Dai pursues his jazz ambition in Tokyo, building JASS with Yukinori and Shunji as each musician faces doubts and new opportunities.

Plot Progression

1. A Saxophone Dream — Dai practices in Sendai with the ambition of becoming the world's greatest jazz musician. He leaves for Tokyo carrying food from Ayaka and seeks help from his old friend Shunji.
2. Building the Trio — Dai meets Yukinori, and they begin playing together. After discussing the need for a drummer, they bring inexperienced Shunji into the group and form JASS.
3. Learning Through Performance — JASS begins performing, and Shunji struggles with mistakes that make him feel like a burden. Dai and Yukinori believe he can improve, and Shunji chooses to keep practicing.
4. Ambition and Opportunity — As JASS gains experience and earns money, Yukinori worries about his repetitive solos while Dai speaks of his So Blue dream. Yukinori receives an opportunity to perform with a visiting band, and his b...