What does it mean when a question says what do you know about the attitude of a character

it simply means the thing or clauses you have read till now how can you tell their personality is or how are their preferences you can use words like their attitude is aggressive, playful, fun-loving, mean everything depends on your reading or your knowledge . Was this helpful let me know?  

appeal to ethos is your answer.

the underlined phrase is an example of : understatment