>>528958397
If I had to narrow it down to three of them for brevity, I'd probably recommend PSSR3, 6, and 11 (Twicolle). Opinions may vary on what the "best" ones, but those three all give a pretty good look into her character and development, be it about her past, her outlook on life, or how she's moving forward. Other cards still are still good too and stuff like S.T.E.P. is recommended if possible.