TV-Series
Description
Serena Jounouchi, a 14-year-old French girl, resides in Kyoto, Japan. Her wealthy family includes her French businessman father, Steven Jounouchi, and her Kyoto-born mother, Karen Jounouchi. Serena possesses blonde hair, blue eyes, and a fair complexion. Her short blond hair is brushed to the left initially; in later years, it lengthens slightly, fans outward, and features reshaped bangs.

She forms the idol duo Serenon with her best friend Kanon Toudou. Beyond Prism Show performances, they perform manzai comedy, where Serena serves as the "boke" (comedic fool). She speaks in a strong Kansai dialect, contrasting Kanon’s calm delivery. Their routines involve rapid-fire insults and playful banter, often targeting rivals. Serena is fiercely competitive, particularly against former Prism Queen Mion, whom she views as her primary rival. Her personality is hot-tempered and arrogant, prone to meltdowns when schemes fail, yet she deeply cares for Kanon and gradually warms to others.

During their Summer Queen Cup debut, Serena and Kanon defeat Aira and Rizumu through a coordinated Prism Show, surprising MARs with matching yet distinct outfits. Serena frequently brags about this victory and consistently challenges MARs afterward. Serenon’s Prism Jumps include "Hattrick Serve" (soccer-themed illusions), "Prism Rainbow Hurricane" (dual tornadoes), and "Smile Heart Dive Duet" (laughing hearts). In an Asakusa comedy competition, they earn near-perfect scores but lose due to one elderly judge’s low mark, prompting them to refine their act under veteran comedian Shizuko Nakayama.

Serena’s competitiveness extends beyond Prism Shows. She joins a basketball match against MARs organized by Yuri, with her father providing the venue and equipment, but Serenon loses. Later, during an Okinawa survival contest, her sabotage attempt—dressing in a shark costume—backfires when Rizumu attacks her inside it.

By *Dear My Future*, 18-year-old Serena exhibits increased maturity. After Serenon’s agency dissolves, she and Kanon join Pretty Top under Kyoko Asechi. Serena continues manzai comedy, evidenced by her typical manzai attire. She mentors PURETTY on handling Prism Star pressures. At the P-nation event, she performs a collaborative Manzai Prism Act with Kanon and Kaname, highlighting her enduring partnership with Kanon and evolved guidance of newer idols.

Trivia notes: Serena resembles Mion in scheming tendencies and visual design (blonde hair, blue eyes, black-and-red performance outfits). She transitions from the arcade game "Pretty Rhythm Miniskirt" to the anime as one of three characters, alongside Kanon and Rizumu. In the manga adaptation, she and Kanon are Rizumu’s friends.