Ep. 8: Chiko faces rogue scientists seeking the Daughter of Twenty Faces' war data to cure their human tank experiments.

Chiko attempts to establish a normal school life and make friends, but Shunka remains resistant to this change. Uncle Genji, a family friend, requests Akine's assistance regarding two rogue scientists, Nozomi Kayama and Takashi Tsuya, who are wanted by a pharmaceutical company. These researchers, who previously experimented on themselves to create an ultimate soldier known as a human tank, believe Chiko possesses war-era data as the Daughter of Twenty Faces that can cure them. The scientists initially abduct Shunka, forcing Chiko to intervene and rescue her. During the confrontation, Dr. Tsuya loses control of his body and attacks everyone before dying. Dr. Kayama escapes, warning Chiko that she will likely be targeted by others seeking the legacy of Twenty Faces.
Episodes
- Ep. 4 · Chiko proves herself during a mission after Ken is compromised despite others' reservations.
- Ep. 5 · Twenty Faces Operates as Circus Performers to Steal the Clock of the Magi
- Ep. 6 · Twenty Faces and Tiger die in explosion after killing their gang, leaving Ken and Chiko shocked.
- Ep. 7 · Akechi Appears and Chiko's New Resolve
- Ep. 8 · Chiko faces rogue scientists seeking the Daughter of Twenty Faces' war data to cure their human tank experiments.
- Ep. 9 · Chiko's aunt plots her death while Shunka proposes a detective partnership to find Twenty Faces.
- Ep. 10 · Chiko visits White Hair Island to investigate Twenty Faces and encounters Ken
- Ep. 11 · Chiko and Shunka visit Shunka's beach home where Shunka confronts her sister's drowning death.
- Ep. 12 · Chiko confronts the White Haired Devil while Akechi rescues Akine from hypnosis