Read it through once
It seems a general remark, but it is not general; the hero mentioned is the to-be hero of the book; and in this abrupt fashion, and without name or description, he is shovelled into the tale. ‘With aspirations to conquer the enemy that would tarnish his name’ is merely a phrase flung in for the sake of the sound—let it not mislead the reader. No one is trying to tarnish this person; no one has thought of it. The rest of the sentence is also merely a phrase; the man has no friend as yet, and of course has had no chance to try him, or win back his admiration, or disturb him in any other way.