Final answer:
Blanche's name in 'The Sire de Malatroit's Door' symbolizes purity and innocence, which reflects the character's traits and narrative situation.
Step-by-step explanation:
In the narrative The Sire de Malatroit's Door by Robert Louis Stevenson, the character Blanche's name possesses symbolic significance. The name Blanche, which is French for 'white', traditionally signifies purity and innocence. This symbolism aligns with the character's portrayal as a young and innocent girl who finds herself in a challenging and potentially compromising situation. The connotations associated with her name correspond to her character's traits and situation, adding depth to Stevenson's storytelling.