Final answer:
The antagonist in 'Everyday Use' is Dee, whose perspective on cultural heritage conflicts with that of her sister Maggie and their mother, leading to the central tension over a family quilt.
Step-by-step explanation:
The antagonist in the story "Everyday Use" by Alice Walker is Dee. The tension in the story arises from Dee's disconnectedness from the family's values and heritage which is exemplified through her conflict with her sister Maggie over possession of a quilt. Dee believes the quilt should be used as art or a symbolic representation of her newly found cultural identity, while Maggie sees the quilt as a practical piece of everyday use that connects her to her ancestors. Mama ultimately sides with Maggie, recognizing the authenticity of her connection to their heritage.