OVA
Description
Yumoto Hakone is a lively first-year student at Binan High School and the main protagonist of the Earth Defense Club. He lives above his family's Kurotamayu hot spring bathhouse alongside his dependable older brother, Gora Hakone. The brothers share a close bond, with Gora acting as a guardian who prepares Yumoto's favorite onigiri.

Yumoto sports thick, fluffy blonde hair parted to each side and reddish-brown eyes. His standard uniform consists of long black pants, a white shirt, an open black blazer, and a light blue sailor scarf. Transforming into Battle Lover Scarlet outfits him in a prince-inspired costume: puffed white sleeves, red cuffs, a red bow featuring a heart-shaped winged jewel, white shorts with red trim, and medium-length white boots adorned with the same jewel motif. His transformation is the longest among the Battle Lovers, requiring a kiss to his Lovracelet and the declaration "Love Making!" as each piece of attire appears.

Innocent, cheerful, and often lacking common sense, Yumoto exhibits a hyperactive personality. He accepts bizarre situations, like encountering a talking wombat, without question and harbors a fascination for cute, fluffy things, frequently trying to hug the club's alien mentor, Wombat. Though easily perceived as airheaded, he becomes defensive when this is pointed out. His loyalty and empathy manifest as an All-Loving Hero who heals adversaries with "showers of love." Unorthodox thinking aids him in combat but hinders his academics. He seeks security, experiencing anxiety and clinging to trusted figures, reflecting Enneagram Type 6w7 traits. As an ESFP, he thrives on social interaction, spontaneity, and sensory experiences, often mediating group conflicts.

Wielding light-based elemental powers as Battle Lover Scarlet, symbolized by red, his primary weapon is the Love Stick, Love of Lumière, though he also uses pom-poms to generate energy attacks. He participates in the team's synchronized transformations and battle cries proclaiming, "We are heirs to the throne of love!" Despite usually relying on teammates, he demonstrates unexpected combat competence, sometimes defeating monsters single-handedly. His confidence grows across missions, though separation from allies causes distress. A notable emotional moment sees him openly confessing affection for his teammates during vulnerability, highlighting deepening bonds.

Key relationships include his close friendship with En Yufuin, whom he admires and addresses as "-senpai." En reciprocates this fondness, comforting Yumoto during crises like Gora's kidnapping. His dynamic with the entire Defense Club evolves into a found-family connection marked by mutual protectiveness and physical affection, like group hugs. He maintains an affectionate rivalry with factions like the Caerula Adamas and VEPPer, consistently prioritizing his club's unity.

Thematically, his name "Yumoto" means "base" and references the Yumoto hot spring in Hakone, Japan. "Hakone" itself combines "box" (箱) and "root" (根). His alias "Scarlet" denotes a bright red hue, aligning with his role. His character design includes an ahoge (hair antenna), symbolizing his quirky nature.