A flashback traces young Tenka's rise through the Shiroboshi School under her mother Omega, who is expelled after defying the ban on challenging Pro Bladers. Tenka wins the role of sub-instructor and inherits Saber Samurai, while Omega's disappearance triggers a wave of ambushes on students, possibly orchestrated by Lantz and Million. In the present, the memories help Robin recommit to the coming match with Zodiac.

What happens

• Omega is expelled from the Shiroboshi School for defying its ban on public battles against Pro Bladers.
• Young Tenka wins a contest against Lantz and Million to become the school's next sub-instructor.
• Several Shiroboshi students are ambushed following Omega's disappearance, hinted to involve Lantz and Million.
• Omega confronts adult Tenka, who declines to join her.
• Robin nearly withdraws from the Zodiac match but is talked out of it after Tenka thanks the team.

Places

Shiroboshi School

Attributed, not verified by us

Claims We Could Not Check

• Adapts manga Chapter 23, with the Shiroboshi School flashbacks being anime-original additions.
• A photo of Omega, Tenka, Lantz, and Million shown in the flashback recreates the cover art of manga Chapter 23.