Well, "Erika" first appeared in "Am I Truly A Monster", but she was actually a reader insert. Then that sparked the diary idea after a conversation with another reader on AO3 and I found it easier to write it as a first person, just like a diary is written.
At roughly the same time, I'd written a mature rated fic called "To Tame A God" and a lot of people were disappointed when it came to an end, so I was planning "States Of A God' Heart", which is a massive story and again, mature rated. Erika appears in this as the main OC. It actually runs parallel to the diaries, so you get more of an idea of what was going on at the time.
I did continue her story after "States" in "Prisoners", but it didn't receive much of a readership and hardly any feedback, so it is on hold at the moment!!
As for recommends of my own stories... they are quite varied. Some are gentle little anecdotes, like the Origins series and others are quite gory and horrible, like "Seven Scars" (Erika is in this too). Quite a lot is mature rated, but I haven't written a mature story for quite a long time now!
Thank you for your interest by the way. All of my stories are written out of a love for the Trickster and His complex character and are gifts to anyone out there who fancies a bit of a read