Final answer:
In 'The Story Teller,' the antagonist is Bertha's aunt, who represents the expectations and opposition Bertha faces.
Step-by-step explanation:
The antagonist in 'The Story Teller' or 'The Bachelor's Story' is Bertha's aunt. In the tale, Bertha is the protagonist, a virtuous and impeccably-behaved child, while her aunt assumes the role of the antagonist through the conflict she presents. As Bertha ventures into the forest, it is the figure of her aunt and her strict expectations that serve as the source of tension and opposition for Bertha. Note that this analysis is based on Saki's 'The Storyteller', in which the bachelor tells a subversive story to quiet some unruly children in a train carriage.