Sōta Jōnouchi attends Ionodai High School and serves as a Guard on its skate-leading team. His tanned skin, blonde hair with a brown undercut, and striking orange eyes define his appearance. He typically wears the school jacket and pants, frequently changing his top, and accents his look with a black and white star wristband alongside red and black sneakers. Personality-wise, he exhibits a hot-blooded and boastful demeanor, initially clashing with teammate Kensei Maeshima through mockery and threats. His primary motivation for figure skating centers on gaining popularity, especially with girls, fueling his ambition to become the team's Lead. Despite showboating tendencies, he commits to rigorous training and hard work. His development includes competing in a team match alongside Kensei, Hayato Sasugai, Izumi Himekawa, and Tomoyuki Kubota, signaling progression toward collaboration after early conflicts. A personal vulnerability is his susceptibility to motion sickness, observed by teammate Itsuki Kiriyama. His name derives meaning from "sudden, quick, sound of the wind" for Sōta and "castle inside" for Jōnouchi.