So some new info from the Kanna spin-off manga. Not sure if this is canon or not, but I'll assume so until told otherwise.
- Saikawa has a complex about getting hand-me-downs from her sister. She wants something that belongs to her and her alone.
- Kanna can use her electricity powers to charge cellphones.
- Fafnir apparently owns a large storage building where he collects arcade machines from the 80s and 90s. The game cabinets can be played without having to plug them in because of special batteries made by Lucoa and Kanna's electricity powers. Although Fafnir hoards the games, he opens up the depot to let kids play them because he wants more people to appreciate the vintage cabinets.
- The Phoenix from Tohru's world can restore your vitality by turning into a fluffy thing and rubbing against you.
- Kanna has learned how to command soldiers from watching human generals in her world. She has also assaulted human castles before despite being considered a "child".
- Being by Kobayashi helps Kanna sleep.
- Kobayashi dotes on Kanna too.
- Iruru has a weakspot on her belly.
- Despite being a nerdy girl who doesn't really care about her fashion, Kobayashi is quite adept at putting on makeup.
- Fafnir still can't sell his doujins.
- Kanna is terrified of loneliness.
- Kanna apparently gets candies from Saikawa everyday.