Sybill had a big sister, but they lost each other a long time ago. While she's been hired in the Golden Cat or any similar someplace, Sybill stayed on the streets. Anyway, she lives in Dunwall but doesn't like the city.

Before and during DH1

She's been in a gang (Bottle Street Gang) for some time when Archibald found her. He was in the City Watch at this time. Archibald met the girl, and soon thought it was such a waste a mind like hers was not really used at its full potential. He took her off of the streets.

And soon enough, the Outsider took interest in her. He didn't give her his mark, but visited her dreams from time to time to help her find little secrets about everyone.

DH2 and DOTO

When the coup occurred, she left Dunwall a few weeks, like everyone who could do it. Then, she came back to finish her current cases and left again, but to Karnaca this time, for vacation. This is why she was already here to help with the bank's break-in case. And a good case was better than any laid back days she had.

Subtitle

She's got a lot of secrets about a lot of people. She has a great mind, think about her as a Sherlock Holmes but in the Dishonored universe (that's... literally her tho, Sybill Howlett as SH). So obviously, she also knows a lot of things about some specific topics. Sometimes, even some gang members come find her for some help. Emily and Corvo knows about her, and maybe she could be a good alternative to replace Corvo as spymaster actually.