Overview
P50 is another option for cleansing enemy HP Shields, though sadly she does not work on bosses. This is another option for dealing with Hannibals, Patrollers, etc.
Her entire passive effect can only apply to other Dolls, not herself, and the effects are so minor they might as well be ignored. Other support Dolls that apply HP Shields apply more than double what P50 offers, repeatedly, while P50 can only apply these once. 25% Evasion (or 50% for P90), is rather underwhelming as well, so all in all, the passive effects can be pretty much ignored.
What she DOES have is HP Shield cleanse on enemies with a baked in 8/12 uptime on a 15% Damage debuff. While not too widely applicable, this can make some fights significantly easier, though may need some manual activation to get the timing right.