The speaker is a ghost, and the poem is built on that one repeated line, "I'm the ghost," which opens almost every stanza. Each time, the ghost reveals another side of itself. It belongs to both past and future, it is "torn apart" and stitched back together with sutures, and it is tied up with both love and fighting. That mix makes the ghost feel less like a simple monster and more like a damaged, divided figure.
Then it turns softer for a moment. The ghost keeps "your frost from biting," so it seems to shield someone from cold or harm. But the next lines flip again: you'll never see it coming, and you can hear it quietly humming, which is eerie precisely because it's so calm.
The ending drops the comfort. "I'm the nightmare" and "you better beware" end the poem on a direct warning. The mood is haunting and unsettled, switching between tenderness and menace, and the short lines and chant-like rhymes make it feel like a spooky whisper.