Actually, Sakuragi the Mouse running back to Bai Yi was completely unplanned, as was her taunt to Bai Yi.
According to the plan she made with the other Sakuragis, she was supposed to lure the Perfect Sakura out to be chased back into the Barrier, where the other waiting Sakuragis would kill her together.
But she just led Perfect Sakura away when she discovered a huge problem:
She couldn't outrun Perfect Sakura.
The Perfect Sakura, who gained a stamina boost after killing the frail Sakura, was not in the same league as her, and there were only a few Barrier entrances in the school, all of which were quite far away.
After running just a few meters, Sakuragi the Mouse realized: with her stamina, she might be cut down by the Perfect Sakura halfway there, so she swiftly ran back to Bai Yi...
As soon as she sat down, a sentence from Bai Yi provoked her.
