Here's are images I promised. I recall Atsumu's image being different. I guess I'm mistaking her for someone else. Might not the kind you are looking for but it's all how Ryoko would have first met them.
Rest I will need to draw since they were not going to show up any time soon.
1.Observe the color. Yumiko is a new succubi. When her animation was created I had no concept of having a sigil of Lady Merusa. It's changed now. One on Sex Priestess is what everyone will have in the future.
2.He doesn't work for her. Don't try to wrap your head around this event. It will be more clear in future.
3.Let the whole timeline thing for Magic Ring. If I explain it now it will be an essay.
5.You got no choice but wait for Magic Ring.
6.Shin and Tomoya are not going to join the orgy.
1.He didn't. A questline in Magic Ring where you try to get Masuo's mom fall in love with his dad. You pluck a hair sample of him to make a clone out it. That's why the clone talks as if Junmi isn't his wife. Ryoko fabricated all the story and the clone is just following all of it. He got a job with his old friend and found Misa who love him.
The three clones are Ryomi, Masumi and Daisuke. All are under Ryoko's control. Masuo's puppet is a different thing.