Who saw Victor destroy the female creature in Mary Frankenstein?

In Mary Shelley's "Frankenstein," the monster himself witnesses Victor destroy the female creature. Victor, fearing the consequences of his creation and the potential for even more monstrous offspring, tears apart the female creature before she can fully come to life.

The monster is horrified by Victor's actions and is deeply saddened by the loss of his potential mate. This event serves as a turning point in the monster's own journey, pushing him further into despair and fueling his revenge against Victor.