While I did expect mono blunt, a tank and Unique Charge ID was something I wasn't expecting. Her S1 and Counter seem pretty self explanatory as your Red Eyes and Penitence generators, but opening with her Counter is probably a better option in order benefit from its condition.
Her S2's bleed condition seems hard to fulfill by herself and the only other Bleed/Charge unit is Rhino Meursault so you probably won't get it off unless you're running R.E.P Ryoshu in a Bleed team. But Haste is really good since she want's to go fast in order to benefit from her passive. But Gloom is a pretty odd choice mechanically speaking since Ryoshu's only use for Gloom is Blind Obsession while both of her Red Eye EGOs want either Wrath or Gluttony.
While her final skills looks odd, the normal one is fine but Only Ashen Remains prevents you from building anything up for an entire turn and unlike the Multicrack IDs she doesn't gain another resource to off set the (unique)Charge loss. Kind of disappointing honestly and I think I still prefer R.B Ryoshu on a bleed team since Pointillist Yi Sang likes all the Debuffs R.B can apply.
Hopefully whenever she get's another Red Eyes EGO, or they get uptied again she'll have another source of Red Eyes(Charge), same goes for Penitence(Charge). It just seems a real shame that Only Ashen Remains bricks her for a turn, hopefully her S3 has something like intrinsic 3 Weight in order to make her finishing off enemies easier so you don't have to deal with her bricked state.
Just looks really good all around, maybe a bit tricky to use but not as much to talk about due to how good this ID already looks like from the preview. But it's worth noting that while he would need somebody to provide Gluttony and more Sloth, this Yi Sang probably benefits even more from Sunshower both normal and corrosion as he has that really strong S3.
Pointillist like Sunshower too, but not as much since he wants to use his S2 more than his S3.