There's a pretty great doujin out there where Meiling's part of a youkai-hunting 'team' and while pursuing a specially dangerous one she comes across the Scarlets who were orphaned by the beast. Meiling kind of adopts them but at the end she's badly wounded taking down the beast and loses her memories, turning into the klutzy gatekeeper we know. Sadly, I can't remember the name :(
The Scarlet Kin. I liked it a lot too, but I'm sure Mizuki00 already read it. As for this story, I guess it was a bit too speculative for my tastes. I wouldn't say that I can't stand original characters, but I wasn't that fond of Laura's role with regards to Flan and Remi or their relationship in this story.
Laura seemed a bit odd in general, since it doesn't really explain why she was so open to having a vampire around. For that matter her staff seemed to follow her lead without any qualms, which had already been established as a VERY strange thing to do.
I did like the story overall, I just wish they'd explained that aspect a bit more.