(I hope I spelled his name right)
As said before, Buff takes on a more direct role during combat. His bitterness leads to RS! Yvgeny being more physically abusive to his minions than canon Ludo’s verbal barbs. This eventually leads to him losing his ancestral home.
The Bulgolyubov was once one of Mexi’s most prestigious noble houses. A proud warrior linage that ruled over the swampland territories. A tragic encounter in the past has made the once noble monster into a vengeful warlord. Unbeknownst to Yvgeny at least one of his children survived the encounter. But poor Katrina couldn’t find the courage to walk past the various thugs that took up residence in her home, and when they finally cleared out…
A new problem arose. Basically older!Katrina is to Yvgeny like Dennis is to Ludo. Dennis still exists in this au as quite the happy uncle.