Brain Powerd: Quincy's Troubled Past (Episode 24)

This is during her childhood flashbacks before the final battle where she took off with Hime's Brain to return to Orphan and she was being chased by Hime and Yuu. The Brain somehow reached her childhood home, where her Grand Cher, appeared followed by Glenn, who at that point had taken over the Orphan leadership position after defeating its previous governor.