Jun Takigawa serves as the trusted assistant to Kyoko Asechi, head of the entertainment organization Pretty Top. Orphaned shortly after birth when his parents died in a car crash, he was discovered at the accident site and adopted by Kei Asechi. Raised within the Asechi family, Jun was legally regarded as Kyoko’s half-sibling until subsequent revelations confirmed their lack of biological ties. He deduced the true identity of Kintaro Asechi—Kyoko’s father—before others, showcasing his sharp intuition.

Poetically inclined and prone to weaving humorously mispronounced English phrases into conversations, Jun combines perceptiveness with strategic insight. He identifies hidden talent, recruiting Aira Harune as a Prism Star successor to Mion Takamine and later recognizing Mia Ageha’s potential. Adopting the flamboyant alter ego Prism Ace, he unwittingly captivates Mia’s affections through his charismatic persona.

Jun’s loyalty centers on safeguarding Kyoko, initially concealing painful truths about her father’s past to protect her. When secrecy fractures, he shifts to steadfast emotional support, reinforcing his vow to shield her. A turning point arrives when Kyoko uncovers an old photograph in her father’s journal, exposing Jun’s adoption and biological parentage. Post-revelation, he proposes during a wedding event, securing their engagement. The story concludes as they visit his birth parents’ grave, bridging past closure with a shared future.

His arc transitions from devoted aide to Kyoko’s equal partner, balancing protective devotion with respect for her independence. The dissolution of their perceived sibling ties unlocks a romantic bond rooted in mutual trust and years of intertwined history, solidifying their journey toward partnership.