DS. Silvala by @drakhenliche (Isabelle Davis)

Blackjack's half-sister (same father). She's a pure silver dragon, but like her half-brother fell foul of Shine's curse. She never recovered any memories beyond only the vaguest of her original identity. Although her body was transformed Silvala's nature was not and she remains a force for good. She was found and taken in by the Knights of the Chalice and has become a member of their order, using her fighting prowess and limited magical abilities to protect the weak. As such, when she finally meets Blackjack (they're currently unaware of each other's existence in the DS continuity) they don't exactly get on too well...