Character Relationship Map: Helldriver

Characters

• Kika (played by Yumiko Hara) — protagonist

  Kika is the central survivor and daughter of Rikka. After awakening with an artificial heart, she uses a chainsword powered by the same source to kill zombies and joins Taku, No-Name, and later Kaito....

• Rikka (played by Eihi Shiina) — protagonist

  Rikka is Kika's mother and the source of the zombie outbreak. After a meteorite destroys her heart, she takes Kika's heart and enters a cocoon-like state. She later becomes the zombies' queen, control...

• Taku (played by Yûrei Yanagi) — supporting

  Taku is a survivor who collects zombie horns with No-Name and sells them as a black-market drug. Kika rescues him, and he becomes her traveling companion alongside No-Name. During their escape from Ya...

• Kaito (played by Kazuki Namioka) — supporting

  Kaito is a former policeman who helps Kika, Taku, and No-Name after they cross the wall and are attacked with explosive zombie heads. He later travels with Kika and No-Name to confront Rikka, and help...

• Yasushi (played by Kentaro Kishi) — supporting

  Yasushi is Rikka's sibling and an insane cannibal who helps pursue Kika and her father. Later, he tortures Maya in a zombie-infested bar and chases Kika's group. He survives a vehicle crash, fights Ki...

• No-Name (played by Mizuki Kusumi) — supporting

  No-Name is Taku's mute companion and Maya's sibling. They collect zombie horns with Taku before joining Kika's journey. No-Name fires a tracking signal onto Rikka's location, enabling the missile atta...

• Kika's Father (played by Yuya Ishikawa) — minor

  Kika's Father is the parent who attempts to flee with Kika while Rikka and Yasushi pursue them. The murderous siblings corner him and burn him to death before the meteorite strikes Rikka. His death es...

• Maya (played by Rui Saotome) — minor

  Maya is No-Name's sister, found by Kika's group being tortured and fed on by Yasushi in a zombie-infested bar. They rescue her and flee, but she suffers severe blood loss during the escape and dies be...

Canonical Relationships

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

• Kika's Father → Kika (father)
• No-Name → Maya (Family Sister) — Their sibling connection motivates the rescue attempt.

  The plot explicitly identifies Maya as No-Name's sister, whom the group finds being tortured in a zombie-infested bar.

• Rikka → Kika (Family Mother And Daughter) — Their family bond is central to the outbreak and final confrontation.

  Rikka is identified as Kika's mother, and she later rips out Kika's heart and places it inside her own chest.

• Rikka → Yasushi (Family Sibling) — They are siblings united by cannibalistic violence.

  The plot explicitly identifies Rikka and Yasushi as siblings who have become insane cannibals.

Story Dynamics

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

• Kika → Yasushi (Conflict Enemy) — Their conflict culminates during the airborne assault on southern Japan.

  Yasushi pursues Kika's group, survives the vehicle crash, and fights Kika on the giant before she kicks him into a missile.

• Yasushi → Maya (Conflict Captor And Victimizer) — Yasushi directly threatens Maya and her rescuers.

  Yasushi is found torturing and feeding on Maya in the zombie-infested bar, then pursues the rescuers.

• Kaito → No-Name (Alliance Team Ally) — Kaito repeatedly supports No-Name during the mission.

  Kaito helps the group containing No-Name after the head-bomb attack, and later helps save No-Name and Kika when the giant collapses.

• Kaito → Kika (Alliance Rescuer And Ally) — Kaito becomes an important ally after saving the traveling group.

  After Kika, Taku, and No-Name are attacked beyond the wall, former policeman Kaito helps them.

• Taku → No-Name (Social Companion) — They operate as an established pair before joining Kika.

  The plot describes No-Name as Taku's mute companion, and they collect zombie horns together before meeting Kika.

• Kika → No-Name (Alliance Traveling Ally) — No-Name joins Kika's mission despite being unable to speak.

  Kika rescues Taku and his mute companion, No-Name, and later crosses the wall with No-Name.

• Kika → Taku (Alliance Teammate) — Taku becomes Kika's companion during the search for Rikka.

  Kika rescues Taku, and the two travel together with No-Name after Taku joins her struggle against the zombies.

Story Analysis

A daughter battles her transformed mother as a zombie apocalypse spreads across a divided Japan.

Plot Progression

1. Hearts Beneath the Ash — Rikka and Yasushi hunt Kika and her father. A meteorite destroys Rikka's heart, triggering the heart exchange, cocooning, and the spread of black ash.
2. The Wall and the Awakening — Northern Japan becomes infected, forcing the government to divide the country with a wall. One year later, Kika awakens with an artificial heart and learns to use her chainsword.
3. Horns on the Black Market — Kika joins Taku and No-Name, who collect zombie horns for illicit trade. Their arrest becomes the route to a government mission against Rikka.
4. Across the Broken Border — Political conflict culminates in the wall's destruction and a zombie incursion. Released to track Rikka, the group crosses into danger and gains Kaito as an ally.
5. The Queen's Final March — The group rescues Maya but loses Taku and Maya during the pursuit by Yasushi. Rikka's giant zombie body attacks southern Japan, leading to Kika's final battle with her mother.