Who is the antagonist in book finally by Wendy Mass?

It's tricky to pinpoint a single antagonist in "Finally" by Wendy Mass because the story explores complex themes of identity, grief, and the pressures of fitting in. There's not a traditional villain with evil intentions, but rather several characters and situations that create conflict for the protagonist, Finley.

Here are some possible contenders for the antagonist role:

* Finley's own anxieties and self-doubt: She struggles to find her place, feeling inadequate and overshadowed by her twin sister's popularity. This internal conflict fuels her insecurities and decisions.

* The "perfect" image: Finley is constantly compared to her sister, leading her to feel pressure to be perfect and conform to others' expectations. This societal pressure is an antagonist in itself, forcing her to suppress her true self.

* The "missing" sister: The mystery of Finley's missing twin sister, Lily, creates a sense of fear and uncertainty throughout the book. While Lily isn't intentionally malicious, her disappearance and the unanswered questions surrounding it act as a force driving Finley's actions.

* The "new" Lily: The character who emerges from the lake claiming to be Lily presents a challenge to Finley's identity and her understanding of her own past. This "new" Lily, while not inherently bad, represents a threat to Finley's sense of self and her perception of her own history.

Ultimately, "Finally" doesn't rely on a singular antagonist to create conflict. It explores the complexities of human relationships, the challenges of finding one's identity, and the impact of grief and loss.