Miss Carpenter, who had come to him with an unusual request, had struck him as the sort of dedicated young person who would not
take kindly to a hitch in her crusade. What is the meaning of the word struck in this passage? O grown o hit - "Object Lesson, Ellery Queen O made an impression on O stopped working in protest
"Had struck him as the sort of detected young person" If you look what the clues in the sentence could mean you could make the inference that "Struck" means that, that is what she saw him as, or that's the impression he left on her.
A literary style popular during the Romantic era that emphasized the flawed nature of man and his potential for destruction rather than progress, often through monstrous heroes and/or sympathetic villains.