Who is the antagonist in the poem, The Unfortunate Lover?

The "cormorants" function as a group character, the antagonist in the poem. They are a thinly veiled satire of the officials of the Court of Wards, who dressed in all black, their uniforms purportedly resembling the coloration of the cormorant. They are characterized as selfish and greedy, feeding on the lover without regard for his health.