Ainosuke Shindo maintains a public persona as a composed politician while secretly embodying "Adam," his co-founder identity within the underground skateboarding world "S." He possesses pale skin, vivid azure-blue hair (slicked back normally, spiky when skating), narrow bat-winged dark-blue eyebrows, ruby-red irises, and a tall, broad build. As Adam, he adopts theatrical costumes: initially a red matador-inspired outfit with gold accents, a crimson cape, blue hearts on red leggings, and a distinctive white winged domino mask with asymmetrical designs; later, following setbacks, he switches to a black "funeral" outfit resembling a grim reaper, featuring bone-like protrusions and a heart-shaped back opening.
Born into a prominent political family, he endured a strict, abusive upbringing under his aunts, who conditioned him to associate love with pain and enforced a win-at-all-costs mentality. His sole childhood solace was Tadashi Kikuchi, the gardener's son, who taught him skateboarding; this bond fractured when Ainosuke's father discovered and burned his skateboard, leading to temporary exile in the United States. During his teenage years, he befriended fellow skaters Kaoru Sakurayashiki (Cherry Blossom) and Kojiro Nanjo (Joe), co-founding "S" as a collaborative haven. However, his escalating obsession with finding an equal skating partner ("Eve") – using violent testing methods that injured opponents – caused a rift with them.
Ainosuke exhibits a defined duality. As a politician, he projects charisma and morality while engaging in corrupt dealings under his aunts' direction. As Adam, he displays flamboyant, ruthless showmanship, viewing skating as a "ritual of love" expressed through physically dominating opponents via techniques like board-locking and his signature "Love Hug" to incite fear or force breakthroughs. He dismisses skaters he deems unworthy (finding Cherry's calculated style "boring") and relentlessly pursues potential rivals, exemplified by his fixation on Langa Hasegawa after witnessing his raw talent. His search for "Eve" stems from a desire for a partner matching his skill and enduring his intensity, enabling him to express his warped perception of love; this pursuit turned destructive, with prior targets severely injured, deepening his isolation.
His development culminates during his tournament beef against Langa. Initially treating it as a violent "funeral" for Langa's spirit, Adam is challenged by Langa's persistence and joyful approach, contrasting his win-driven philosophy. Langa's escape from the Love Hug and evident enjoyment despite the danger recall Adam's own initial happiness skating with Tadashi. The unresolved race, interrupted by police, and subsequent observation of Langa and Reki Kyan skating as equals lead Adam to acknowledge skating's core value lies in shared fun and friendship, not domination or victory. This realization prompts reconciliation with Tadashi, suggesting a tentative shift toward healing fractured relationships. Official media indicates ongoing focus on their dynamic.