"And here I thought I'd been doing rather well on that front." It's an admission Hifumi doesn't mean to let slip - she's fairly open, it's true, but that doesn't mean she feels a need to discuss the details - and she covers for it by changing the subject.

"Ren's personality and my hobbies make for a frightening combination. I'm almost sorry for unleashing it on these unsuspecting people, but they asked us to step in with the eggs."

(And Ren's her best friend, and his attitude has clearly been rubbing off on her while they've been here... so she's only a little sorry.)