These are moveset and "bar" explanations, not guides, I think.
I've always had a hard time with Pianissimo, especially because she's still SS0 for me. Thus, I've learned I've missed out on lots of odd buffs she has the are conditional based on doing things in a certain order. I had no idea that for those of you with SSS-rank Pianissimo get a buffed hold attack and hold dodge based entirely on the number of music notes spent before-hand. I always wondered why that 0 in her bar was unused! Now I know!
This character had tons of word soup I had to digest and it really ate away at my psyche, but over the course of several short stints of working on this, I think I got everything.
As an aside, the new max Harmony of Pianissimo is worded so strangely. It states "WHILE casting Melodic Outburst (HOLD DODGE), the cast timing of Concerto Orb (WHITE ORBS) and Rhythmic Piercing (BLUE ORB) can be moved up"
I don't know what "moved up" means, and these tests were all performed with the harmony active. I'm assuming the amount of delay between each cast of white and blue orbs AFTER casting HOLD DODGE is shortened, which should speed up the rotation?
The Harmony also says that there is now TLC for the FIRST cast of HOLD DODGE after a switch-in, so I guess that's nice. The rest of the Harmony notes are just damage and signature energy increases, so there's not really any gameplay changes from the harmony except whatever "cast timing moved up" actually means.
Previous Movesets:
03: Lucia - Pyroath
02: Kurumi Tokisaki - Kurumi Tokisaki
01: Lucia - Lotus