Sachiko Yukimura is David's former classmate. While in hiding from the Tragedy, she became an Enhanced with the moveset of the Terror of Death, Haseo. After Tokyo was restored, she joined the school's tennis club. She was coming home from tennis practice one day when Pandora whisked her into a Viperia cell in a Code Lyoko redux but managed to escape along with Eze, Leafa, and Nu, though separated from the other two shortly after. With Chopper's help, she was able to defeat Arbok but was taken to the Sunny with Eze as they were poisoned. After some deliberation, she became a member of the Brave Adventurers when she reunited with her friends.
It is soon revealed in Cyber Sleuth, that Sachiko was among the volunteers for the EDEN Beta Test. During this time, Sachiko stumbled into the Digital World and met Crusadermon(who at that point was a Kapurimon), but her memory of that time was wiped by Suedou when an Eater attacked Yuugo. Although Sachiko and Crusadermon reunited when Tokyo was digitized years later, they didn't recognize each other at first and were fighting on opposite sides, but after freeing Crusadermon from Kishibe's influence, and subsequent brainwashing from the All Science Go Corporation, the two have become partners.
After defeating Suedou, Sachiko decided to help David and the Royal Knights in taking down Theodore Flux and destroying the All Science Go Corporation.
Voice Actors[]
En: Cherami Leigh (Makoto Nijima/Persona 5)
Jp: Mao Ichimichi (Julieta Juris/Mobile Suit Gundam: Iron Blooded Orphans)