For each time Pearl Sisters, Perle is played , Pearl Sisters, Perla gets separate instances of the effect "When this unit's attack hits a vanguard, Soul Charge (1), and draw a card"

However, please take note to resolve it as such:
- soul charge 1, draw 1 card.
- then soul charge 1, and draw 1 card again.
(*Do not soul charge 2, and draw 2!!)