Through Canto 9 (and part 3 releasing 1/15), we have found more about Ryoshu/Yoshihide. As it turns out:

• She was trained by 5 nursefathers, and when she left the House of Spiders, those 5 nursefathers got 1 apprentice each.
• She might have gotten the desensitization of brutal injuries/gore through The Thumb when she was being trained by Valencina.
• She is 27 years old. Yes, 27. She may be turning 28 this year, except the PM Universe's date differs from the Gregorian Calendar.
• She does have a daughter (from what Lei Heng first said), but we don't know who.
• There is a Yoshihide baby sprite. It looks cute.
  
  There is also an adult Yoshihide, but I cannot import it here

I am excited for Canto 9 to fully release, along with the new E.G.Os.

EDIT: I have decided to list my expectations, and which one remained true.
Post

Ryoshu's past relations with Lei Heng - It is true, his line was mentioned at the beginning
Ryoshu's daughter (who I call Yuzuki) being the most victimized out there - Nope it's Ryoshu. Though i dont know the daughter's name canonically.
Ryoshu's process of painting
How her SANGRIA habit formed
From the Forest of the Flames EGO, we saw the Five Fingers. I expect to see how they are related with Ryoshu. - Each finger has one person who trained her.
If she knew one or some of the sinners before, most likely Hong Lu
Ryoshu's ranking in the Thumb; I saw how Lei Heng tolerated Ryoshu instead of like, chopping off a limb or even executing her. - She isn't in the thumb