1- Maya will be the Killer because of her Past history with her father. She might have murdered him because he was becoming a Kanta in her love life with Arjun. ( I honestly think Maya won't be the killer but you never know)
2- Arjun will be the Main villian who married maya for her money. He might have murdered ashwin on the wedding night because if they didn't got married he would have lost maya's money and everything. I don't think he is even in love with maya, he is just faking it. Plus his master paln could be murdering ashwin and frame the obvious suspect maya and get all the money. Arjun could be doing all this with Jhanvi or Sanjh assistance to prove maya crazy 😲
There is NO way in Hell anyone else other than these two will be the killer because then the show won't make any sense. Sanjh being the killer makes no sense at all because she isn't the lead. The Killer is definitely one of the leads which is either Maya or Arjun