Kiyotaka Arisu is a male character featuring distinctive red hair, golden eyes, and sharp teeth. His signature style includes frequent use of sunglasses paired with oversized coats. His background identifies him as a former singer who shared a significant romantic history with Kazuomi Usaka during high school, establishing them as ex-lovers; this relationship forms a core aspect of his backstory and emotional conflict.

Narrative depictions, particularly during events in Spain, showcase Kiyotaka's audacity and resourcefulness. He notably evaded security personnel by consuming 20 lollipops in an attempt to reach Usaka's company, using an unconventional method to solve the problem. While his overall personality remains largely undefined beyond this specific incident, his complex history with Usaka suggests depth in their interactions.

Within the Spain-focused storyline, Kiyotaka's role manifests indirectly through Usaka grappling with their shared past. Their dynamic contributes to the narrative's exploration of unresolved relationships and personal reconciliation.