I think it is what can be seen and heard of the character.
Answer:
overstatement --> E. hyperbole
pleasant-sounding --> C. euphony
understatement --> A. litotes
simile --> B. cool as a cucumber
cacophony --> D. opposite of euphony
Explanation:
An overstatement or hyperbole is a figure of speech that uses exaggeration to express an idea, a feeling, an action etc.
Euphony refers to a harmonious combination of words or sounds, being pleasant to the ear.
An understatement is the description or presentation of something as being less important than what it really is. Litotes is an ironic understatement.
A simile is a figure of speech which makes a comparison - stating a similarity - between two different things. It uses words such as "as" or "like".
Cacophony is a discordance of sounds, unpleasant to the ear.
