I have received her and currently she is yet to be finished up on maxed out for me. However, from what I did get out of her, I can easily place her as one of the best valentines offensively.
She doesn't have the buff removing capabilities as Silent Kill does but she does have a reliable access to armor break and bleed, this combined with having the highest attack of all valentines maxed out lvl 60 diamond according to the mobile fighter gallery (11,847 is not bad for a val). While this does mean you need to play very aggressievly as her if you need her bleed and armor breaks, moving back to gain a little armor or thorns isn't bad either. Overall, can be the best valentine in the right hands.
Her bleed however despite her good atk stat still makes her a bad match up against ICU Valentines and Blood Bath so keep that in mind. Pairs nicely with Sheltered
Defensively, she has the 3rd highest hp of all valentines (according to the figther gallery), only Last Hope and Assassin's greed have more hp. Its also uniquely interesting since it basically forces the player to be at their corner inorder to prevent her from gaining her buffs. Shes still a huge threat overall but she can be countered with the likes of Purrfect Dark for example. Still, a worthy candidate for defense.
Offense -> 9/10
Defense -> 8/10
Recommended MA: ICU
Recommended Stat investments:
Offense:
ATK%
Crit Rate%
HP%
Defense:
HP%
Defense%
ATK%