In “Because I Could not Stop for Death,” what attributes does Dickinson grant to death? Why is immortality going along for the ride?

In the poem "Because I Could Not Stop For Death" by Emily
Dickinson, the poet suggests several character traits for Death. Although she suggests
that he is polite, civil, courteous and 'kind' there is also a darker tone where he is
more threatening and intimidating. She suggests that just because she ,like many of us,
will never feel ready for death, having much more to achieve before giving up life,
death will still come. he is persevering and assertive even if that is in a quiet way.
Even though he allows her to see happy images and histories for the last time, he does
not stop the carriage which has become like a cortege, but has it drive on relentlessly
towards her end. Polite or no, Death ignores her feelings.