Well and not all the time but you said at night the cats get the house. Maybe try to exhaust Star during the day and then have 30 mins-1 hour of her chilling leashed and the cats wandering so they get used to each other and learn to relax.

Yes cats r free night time-meaning free outside so no one is chasing them since Star is sleeping till the morning...Stars goes to sleep around 9 PM so if cats r still available-tonight I can try to let them a bit around (what became Stars part of the house now). I really like ur advice wish I had it before and not let all go like this for 5 months. but everyone said dont push it give them space and time passed and no improvements were made.We just learned how to separate them well and how to live together under the same roof but still apart.