What literary devices are used in the poem "She Was a Phantom of Delight" by Wordsworth? Is there personification, alliteration, or imagery?

You ask about personification, alliteration, and imagery in "She was a Phantom of Delight." In this poem, Wordsworth uses objectification, which is the opposite of personification, to describe the woman who is the poem's subject. In personification, an animal or object is given human characteristics. In objectification, a human is assigned non-human attributes.

The poem's narrator objectifies the female subject as a ghost, calling her an "apparition," a "phantom," and a "Spirit." He also likens her to an "image," a "Creature" and a "machine," all non-human items.

There's very little alliteration in the poem. Rather than employing repeated consonants in the same line to build an effect, Wordsworth instead relies on rhyming couplets to structure his verse and provide rhythm. Several lines, however, do use alliteration, such as "For transient sorrows, simple wiles" (with its repeated "s" sounds), "A Being breathing thoughtful breath," and "To warn, to comfort, and command."

Wordsworth employs imagery in this poem. Imagery is the language of the five senses: what we can see, hear, touch, smell, and taste. Here the narrator likens the woman's eyes to stars at twilight and her "dusky" (dark) hair to twilight. But he notes that she is more like "May" or "dawn," bright images. He also calls her a "traveler," an image implying that she is dead and her life was a brief journey.