User blog comment:General MGD 109/Demonic Omens/@comment-5619706-20130216043309

I'm thinking the reasons are meta (writer-related), but in an in-series perspective, Lilith seems to enjoy perversed reveals in the sense that she does not go for the grand entrance. Keeping it low actually allowed her to catch people off guard (see the police station, entering Ruby), unless of course her targets are already aware that she is arriving (Monster at the End of This Book).