Jinrai Has Arrived! / Redecorating Is Fun
Another F.A. Girl named Jinrai comes to Ao's place to battle against Gourai. After Gourai beats her once, Jinrai proposes a sumo match, only to lose that as well. Later, the girls are given their own miniature rooms to decorate. As each of the girls work hard to make their own personal rooms, the Materia sisters use almost all of Ao's savings for their own dollhouse room.
Aired 25/04/2017EP 4 - Jinrai Has Arrived! / Redecorating Is Fun
Frame Arms Girl
The story begins when Ao opens a package that arrives at her doorstep. Inside the package is Gourai, a Frame Arms Girl: a small robot capable of independent movement. Gourai is a newly-developed prototype: a Frame Arms Girl equipped with an "Artificial Self," an advanced AI that gives her a personality. Ao is the only one that has activated her. Gourai begins to gather both battle data and emotions, starting a day-to-day life with Ao, who knows nothing about Frame Arms Girls.
(Source: Anime News Network)