The speaker
Philosophical, passionate, and assertive, the speaker of this poem (whose gender, name, age, etc. are unspecified) expresses their love for the addressee (the “lady”) and muses upon the nature of love and logic, life and death.
The "lady"
The addressee of the poem; the person for whom the speaker pledges their genuine love. (The gender of the speaker’s lover is revealed halfway through the poem, in line 10.) We don't know much about her, but the speaker mentions specifically the enchantment that she causes just by fluttering her eyelids.
