Yuki Makoto

On his way to school, he was wearing headphones and listening to music.

This is also a byproduct of his perception of life, more specifically from the result of having kept Death itself sealed within him for a majority of his life: Junpei himself would later see the protagonist eye to eye and understand his abilities, saying that he "harnessed [Death's] power and made it his own."

That helps him support his Social Links when resolving their problems, primarily by having them face their mortality (whether it's their actual or metaphorical death) thanks to his help. The protagonist does so by being supportive of them, as the correct dialogue choices usually involve him agreeing with them directly.

Many of his personality traits and reactions to certain situations are ultimately based on the player's actions and decisions. The primary choice has him being enthusiastic, upbeat, and kind, engaging with as many Social Links as he can, each one rewarding him with stronger power in Persona fusion and combat. Likewise, the player can make him pessimistic, morbid, and lonely, barely engaging with Social Links. In normal conversation, the protagonist's dialogue choices can range from attentive to unobservant; the latter is usually met with negative response, advising the protagonist tries to enjoy life more. One of the protagonist's most common responses is "I don't care." Even when speaking to Pharos, the protagonist can respond saying that he doesn't care about his friends. These possible combinations of traits provide a wide range of various interpretations of his characterization. The same goes for any possible romantic interests the player may desire to partner him with.