Ah! A Teaching Practice Called Showdown? - S1.E14

Skuld reveals her latest invention: Banpei-kun RX. Banpei is a robot designed to protect Belldandy, which he does easily as Marlier shows up for an attack. But that also means protecting her from Keiichi and Urd and draining tons of power from the house. Can Skuld teach Banpei to play nice? And what will they do when Marlier launches another attack?