Quick rundown on the Harry Potter side of this fic.

Amaryllis Orme is basically replacing Severus Snape.

She grew up in Leadworth with James and Petunia Potter, as well as Charity Burbage and Xero.

The Marauders would have then consisted of Lily Evans, Remus Lupin, Sirius Black, and Peter Pettigrew and still would have made Rylli and her friends schooling life hell.

James still married Lily, though by sixth year any friendship between Rylli and James had all but gone up in flames after the stint by the lake.

Regulus Black and Amaryllis were inducted into the Department of Mysteries the moment they stepped out of Hogwarts because of their unusual knowledge with aliens - sort of having it that the DoM's timing of snagging the pair as soon as they left corresponds with the time the Doc left his alliance with UNIT and the magical world - or the Dom at least - understood the need to learn of this new and possible threat.

Voldemort died when he first tried to kill Harry as an infant, which means that James and Lily still died, though instead of living with the Dursleys, Harry grew up with his aunt, Jackie Tyler and cousin Rose instead.

Voldemort's Horcruxes were rounded up and destroyed long before Harry made it to Hogwarts, and as such Amaryllis has very little - or did - have very little to do with him during his schooling years.

And because Voldemort never returned, the Second Wizarding War never happened and Charity is still alive.

Regulus still dies, though it was his death that led to the DoM learning of Riddle's Horcruxes - will be explained in the fic.

Lucius also dies before Draco would have gone to Hogwarts and sort of skipping over the fact he had a son - possibly having tried with Narcissa but never succeeding.

By the time this fic starts in March of 2006, Amaryllis has been working for the Dom for over twenty years, and has also undergone some changes.

She's apprenticing with Marduk to become a Ley Master, as well as works for Marduk's former Master and boss Anshar in the DoM's Magic and Ley's Relations office - Anshar got bored one day and decided to create himself a job...

Charity still works at Hogwarts as a Professor and Xero just somehow became like the Malfoy replacement in the Magical world despite the fact that he's most definitely alien...

UTTER CRACK in all honesty, but I'm rolling with it.