For each time Pearl Sisters, Perle is played , Pearl Sisters, Perla gets seperate 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 and draw 1 card.
- Then soul charge 1 and draw 1 card again.
- (*Do not soul charge 2, and draw 2!!)