Iroha Tamaki was fighting the witch embryo Eve because it used to be her younger sister Ui, and Ui along with her friends Touka and Nemu made a wish to change the original magical girl system but due to the impurities Ui couldn’t handle all the power so she turned into Embryo Eve but her memories were transported into a tiny Kyubey and Iroha had regained her memories because of the tiny kyubey.

“Ui don’t worry your big sister will save you..”

Iroha then aims her crossbow towards the red gem on Embryo Eve and she sees Ui and she jumped into the air and hit the gem and Iroha gets teleported somewhere and she sees Ui.

“Ui..”

Iroha then walks up to Ui.