The Archive - Need to Know
Who Ivy is - or rather what the Archive is - has been briefly explained here by Harry Dresden. The Archive contains, within her mind, the entire written history of mankind. She immediately absorbs the knowledge and understanding of anything that is written down. As the Archive comes from the Dresden Files universe, most of the media from that world is already instilled in her - Star Wars, DC and Marvel comics, Dean Koontz novels, there's a LOT that gets referenced (thanks to Dresden being a pop-cultured badass), which gives her a VERY wide range of information.
Upon arriving in this new world, she began to absorb information again - on the things that would have been missing from her reality. There are (as discussed with the mods) random pockets/fluctuations of energy/magic/power that create 'blank' spots in Ivy's wealth of knowledge.
This is an extremely useful tool for me, as it means I don't have an omniscient character! But Ivy is still pretty damn close to it. If there are things about your toons that stand out, or that Ivy would absolutely know, please comment and let me know what I should be aware of! There's no way I can research everyone's character on my own!
In the same vein, if there is something about your character that you do NOT want Ivy to know, comment here or contact me at dyaniera [at] gmail [dot] com. I am happy to work this out with you and would rather prevent any issues right off the bat!
Last matter - there were plenty of people (rescuers and rescuees) that were unhappy about ricocheting bullets killing guards. Ivy is perfectly willing to speak with anyone who wants to confront a 15 year old girl about killing people. Let me know if you'd like a scene with her!