"Look, I made this! It's your new sister!"

"... is that another Immortal Knight?"

"No, it's a miniature hot-air balloon, but I put a face on it and made it have our colors. I was thinking it could help out around the library."

"How?"

"Well, it can float."

"You can already float, professor."

"Yeah, so that's one big plus it already has, right? I mean, I can float, and I have a degree. Logically we can conclude a hot air balloon with a face should have a degree too."

"... you really need to get outside."

And that's the other reason S.V. became a player character