Signum pauses to think for a moment, and decides this girl can be trusted with a little more information about her past.

"I...well, my ascension to the status of 'Heroic Spirit' was a bit unique. I can remember previous summonings with the Book of Darkness, and the summoners were significantly less...moral than you," she says, skipping any and all possible details to support that conclusion.

"You're...a good person, Hayate," she adds, based on 100% of the available evidence.