Ryo Tsukumo is a male character distinguished by violet hair and yellow eyes, standing 178 cm tall. He held the position of president at Tsukumo Productions, the agency managing the idol group ZOOL, and directly oversaw their activities as their manager.

Personality assessments characterize him as analytical, strategic, and logical, with a systematic approach to situations. He demonstrates independence, self-confidence, and emotional reserve. These traits align with an INTJ personality type, reflected in his goal-oriented management style and meticulous attention to detail. Alternative analyses suggest ENTP traits emphasizing creativity and unconventional perspectives. Enneagram assessments classify him as a Type 8 (the Challenger), marked by assertiveness, determination, and a drive for control and autonomy. This type also manifests as protectiveness toward those he values, alongside potential stubbornness or aggression when challenged.