Martinez, a friend of main character Hayato Narita, operates within Yanagihara city's street vignette narrative alongside Hayato. He faces gunfire during a confrontation, surviving a serious gunshot wound. An ambulance transports him for treatment. Later episodes confirm his recovery from the injury, subverting the common trope of such characters meeting an early demise. Contextualized as the "Token Black" character, this role is particularly noted in relation to Alice, who is learning Japanese. His presence weaves through interconnected events across the city's nighttime landscape. Martinez's interactions and experiences contribute to the broader narrative exploring young lives in Yanagihara.