Which words from the text best describe the narrator's reaction to Usher?

Prevailing character of these features

Any idea of simple humanity

Feeble and futile struggles

Startled and even awed

The best answer for this question would be:

"startled and even awed"

It comes from the line "conclusions deduced liquid, and luminous nervous agitation startled and even awed ", this line deeply describes the transition of the reaction.