This episode focused mainly on Makoto's students. I really like this part of the story, the part that deals with Makoto's teaching. I wish that there were more series that included teaching as a story element. Instead, most manga/anime are from the perspective of a student rather than a teacher, and those that are from a teacher POV often don't have the actual educating part of the job as a focus.
It sucks to be the Rembrandt sisters, with your dad having the ability to influence your teacher like this. Their training time will unfortunately be cut short compared to everybody else. I am sure they will give their father an earful when they see him next.
The last thing I wanted to mention here is the significance of Rona's telepathy spell. It's been a while, so I can't say I remember everything from back when I read it though, so if it is fresh in somebody's head, feel free to correct me. The important part is that Rona's version of the telepathy spell includes parts that prevent eavesdropping in ways that the standard telepathy doesn't. Tomoe and co. think that this will be useful to incorporate into their own telepathy spells to try to prevent the Goddess from eavesdropping as well as learning lessons from it generally to prevent her meddling in their affairs at all.
In case it isn't clear at this point, Makoto is holding a grudge against her specifically because of how she plucked him out of the world and threw him against Sophia without any choice. Since then, he has been searching for ways of preventing something like that ever happening again.