Answer:
He is investigating the rumored haunting at Lorraine Castle. The other characters in the story are the three elderly caretakers, who the narrator initially finds disturbing.
Explanation:
"The Red Room" is that he gradually becomes unhinged by fear. During his night in the red room he feels incredibly uneasy, as if there's a ghostly presence lurking around.
We can hear the siren sound of the fire truck more loudly during night time than day because during the day time there are many obstacles which absorbs sound.
The implicit meaning in the line "now I'm someone who watches tractor pulls on obscure cable channels" is that, though an Indian immigrant, in some ways she feels very integrated into American society. The main contextual clue in the line is "tractor pulls" because tractor pulling is a kind of competition that one would not think is popular in India, but it is kind of motorsport competition that is popular in the United States. The fact that the speaker is watching this competitions on cable channels lets the reader know that she has adopted some american cultural customs.
