Just deducing from the intro of the second volume. It mentioned Sakuya's fantasy is not about time itself, but about murderers. Perhaps that time stop ability is just the manifestation.
Had to re-read volume 1’s talk about her ability again.
Shintear said: So Sakuya's on auto-kill? I thought her ability was only time-stopping...
Sakuya's ability is indeed time-hax-ing (and knife-throwing). But, if you're wondering, just read her spellcards name, it tells a lot.
Well, can't say for sure since ZUN is always trolling the "SDM" canon
There was no certainty of success... well, the risks outweighed the benefits.Ah, yeah, one more question.I beg your pardon?Hmph. It's probably for the best that you don't know.Even though you should have known this fact, why did you insist on doing it?I will leave out the vampire case, but this time, do you think it’s really necessary to pick a fight against the gods?That's why, I'm surprised...In that sense, I don't understand why you'd do that...Well...What is your relationship with the Princess of Subconsciousness ?