so i am currently running waterdeep dragon heist and my one player has this intriguing backstory that i want to give events for. so basically she is a female half elf paladin named melanie who is in an intimate relationship with another players female character bridgette who is secretly a succubus ( found a decent homebrew race ) which i think can be taken advantage of. so her back story is melanie's elf mother named nyana is a noble in water deep and an expert tinkerer who uses her skills to create mechanical toys for the children of waterdeep but as most nobles go nyana was forced into an arranged marriage with a man she didnt love, a very cruel, power hungry and greedy high elf named kharis who has alot of sway in the city due to his family helping in military advancements. so in this marriage nyana runs into a commoner, a silver scaled dragon born bard named narrash to whom she fell in love with and he fell in love with her in return thus had an affair with narrash and becoming the father of melanie which is why she is a half elf. nyana sought to run away with narrash and leave waterdeep but kharis found out about the affair and plan to run away via his own spies and commissioned the xanathar guild ( my players dont know this part ) to ambush narrash and kill him which sadly went off without a hitch and narrash was killed. kharis was furious that his possession ( melanies mother ) would dare betray him so to make himself look innocent and look like a kind man to the public he spun the lie that the dragon born assaulted his wife thus this child was born but out of the kindness of his heart adopted her as if it was his own then proceeded to abuse and mistreat melanie and nyana even going as far as cutting off one of melanie's arms when she was defiant. nyana one night couldnt take it anymore and helped melanie escape at the cost of staying behind to distract melanies step father kharis so now out in the world she runs into a paladin group who took her in, nursed her back to health and she joined there order. now fast forward to the present a few years later and she found herself back in water deep hoping to find her mother and save her from her tyrannical abusive step father

so with THAT out of the way i need ideas on how kharis pops in and out of the narrative to be kind of a reoccurring minor villain. some things to know about kharis is im making him basically a warlock of the fiend and the fiend he serves is asmodeous himself and i have also tied in another characters backstory into kharis, this character is a warforged that used to be an elf assassin who was taken by kharis and turned into a warforged with his heart as the power source and brain to enact his assassin skills but was damaged in one mission and lost his memories so my plan is to eventually have the players sneak into kharis's manor in search of nyana who they later find out was also turned into a very life like looking warforged which was her punishment's for defying him and for a way to fully control her ( i know this guy is a scum bag and i cant wait for my players to take him down lol ) but before we get to the rescue mission like i said i need ways for him to pop in and out

at the moment kharis knows melanie is back in town and knows they own the bar i just havent had him harass her yet as i need ideas

im also thinking of making him secretly an elf that was transformed into a cambion for his servitude and if i go that route im thinking of maybe sending demons to spy on her at the bar and maybe periodically poke at them