Tatsumi Madarao is a member of the idol unit Tenjyou Tenge, known by the alias "Crimson Dragon." He stands 183 cm tall, weighs 62 kg, and was born on June 23rd with blood type O. His striking appearance features red hair, yellow eyes, and a signature headband, sometimes paired with earrings.

His personality blends fierce competitiveness with unexpected vulnerability. Driven by an intense determination to propel Tenjyou Tenge to global idol supremacy, he nonetheless experiences melancholic lows. During these periods, he retreats into solitude yet struggles with loneliness, leading to relatively swift recoveries. Tatsumi expresses himself bluntly, voicing his likes and dislikes without hesitation. Despite his energetic youth, he exhibits mature tastes, finding appreciation in traditional sites such as Buddhist temples and Shinto shrines.

He frequently clashes with fellow unit member Aoi Kakitsubata, largely due to Aoi's seniority and perceived condescension. Their interactions often escalate into arguments. Yet, Tatsumi openly acknowledges Aoi's talents and abilities, indicating an underlying mutual respect beneath the friction.

Tatsumi's path to becoming an idol began unexpectedly when his sister submitted an application without his knowledge. Initial surprise gave way to gratitude for this intervention, sparking a genuine passion for Tenjyou Tenge's activities and performances. His family includes unnamed parents, a sister, and a brother. His personal interests center on solo travel, accompanied by a fondness for chikuwa and a distinct dislike for turnips.

Within Tenjyou Tenge, his unwavering focus remains fixed on achieving widespread recognition and popularity for the group. This ambition fuels his dedication to their collective success, shaping his actions and motivations.