Character Relationship Map: Amanchu!

Characters

• Futaba Ooki (played by Ai Kayano) — protagonist

  Shy high school girl who joins the diving club and discovers underwater joys.

• Hikari Kohinata (played by Eri Suzuki) — protagonist

  Energetic diving enthusiast who mentors Futaba in underwater exploration.

• Ai Ninomiya (played by Saori Onishi) — supporting

  School teacher and diving club advisor.

• Makoto Ninomiya (played by Yuuichirou Umehara) — supporting

  School staff member involved in club activities.

• Kokoro Misaki (voice) (played by Ai Yamamoto) — supporting

  Voice actor for a diving club member.

• Kino Kohinata (played by Kikuko Inoue) — supporting

  Family member of Hikari, supportive of diving.

• Cha-Komon (played by Yurika Kubo) — supporting

  Diving club advisor and mentor.

• Mato Katori (voice) (played by Shizuka Itoh) — minor

  Voice actor for club member.

• Peter (voice) (played by Miyu Irino) — minor

  Voice actor for animated character.

• Chizuru Himeno (played by Chiwa Saito) — supporting

  Diving club member and friend.

• Akane Mizunashi (played by Erino Hazuki) — supporting

  School staff or club advisor.

• Principal (played by Fumihiko Tachiki) — supporting

  School administrator overseeing club activities.

• Kotori Misaki (played by Ai Kakuma) — supporting

  Diving club member.

Canonical Relationships

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

• Hikari Kohinata (voice) → Kino Kohinata (voice) (family)

  Kino is Hikari's family member within the Kohinata household.

• Futaba Ooki → Mato Katori (voice) (Student Advisor)

  S1E2 homeroom teacher, S1E5 jogging for strength, S1E7 punishment game, S1E11 responsibility reminder.

• Hikari Kohinata → Mato Katori (voice) (Student Advisor)

  S1E2 races teacher, S1E7 follows train for hydrangeas, S1E8 fitness exams.

• Ai Ninomiya (voice) → Makoto Ninomiya (voice) (family)

  The two characters share the Ninomiya family name and belong to the same family circle.

• Futaba Ooki → Kino Kohinata (Student Instructor)

  S1E4 Kino teaches diving, S1E10 Futaba shares progress with Kino.

• Cha-Komon → Hikari Kohinata (professional)

  Guides teenagers in scuba techniques and safety protocols

• Ai Ninomiya → Mato Katori (voice) (Student Advisor)

  S1E5 club meeting, S2E9 Peter's fantasy involves Mato.

Story Dynamics

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

• Futaba Ooki (voice) → Hikari Kohinata (voice) (social)

  Hikari meets Futaba after her move and becomes her close friend and gateway into diving.

• Futaba Ooki (voice) → Hikari Kohinata (voice) (alliance)

  They join the diving club together and share underwater exploration experiences.

• Ai Ninomiya → Peter (voice) (Fantasy Companion)

  S2E7-9 festival encounter, transported to fantasy world, Peter parts with Mato-chan & Ai.

• Hikari Kohinata → Ai Ninomiya (alliance)

  Participate together in scuba diving club activities and underwater explorations

• Ai Ninomiya → Hikari Kohinata (Club Friends)

  S1E10 shopping together, S2E2 fireworks festival VIP seats.

• Mato Katori (voice) → Peter (voice) (Fantasy Figure)

  S2E9 Peter parts with Mato-chan & Ai, Mato involved in festival events.

• Futaba Ooki → Ai Ninomiya (Diving Buddies)

  S1E5 Ai discusses certification, S1E10 beach hangout, S2E2 fireworks festival.

• Hikari Kohinata (voice) → Ai Ninomiya (voice) (social)

  They participate in the same diving-centered group and share recurring activities.

Story Analysis

Chronological and thematic progression across two seasons of diving club life and personal growth.

Plot Progression

1. Season 1: Arrival & Club Formation
2. Season 1: Pool Mastery & Bonding
3. Season 1: Open Water Certification
4. Season 2: Summer Reflections & Doubts
5. Season 2: Festival Fantasy & New Beginnings