OVA
Description
Rena Ryūgū, born Reina Ryūgū in Hinamizawa, relocated to Ibaraki during childhood following her mother’s career-driven move. Her family fractured after her mother’s affair and subsequent pregnancy, culminating in divorce and deep-seated trauma. Reina severed ties to her past by renaming herself Rena, excising the “i” from her name as a rejection of “icky” memories—though she later grappled with the loss of positive associations tied to that letter.

In Ibaraki, Rena’s mental state unraveled under Hinamizawa Syndrome, marked by delusions and paranoia. She assaulted three male classmates with a baseball bat after their attempted sexual assault, an act that escaped legal consequences. Her spiral escalated when she shattered school windows, resulting in hospitalization. Hallucinations of Oyashiro-sama’s voice urging her return to Hinamizawa—later revealed as Hanyū’s influence—guided her flight home.

Back in Hinamizawa, Rena fixated on gathering discarded objects she labeled “cute,” hoarding them in a junkyard van she claimed as a secret hideout. This “Kyute Mode” heightened her agility and fueled compulsive urges to “take home” items or peers like Rika and Satoko. Though outwardly whimsical, her sharp intuition allowed her to dissect crime scenes and detect deception, triggering violent reactions when confronted with lies.

The Tsumihoroboshi-hen arc saw Rena murder scam artists Rina and Teppei to shield her father from financial ruin. After obtaining Takano Miyo’s scrapbook, doubts about Oyashiro-sama’s curse and her friends’ loyalty drove her to hold classmates hostage. Keiichi’s intervention averted disaster, exposing her remorse and potential for redemption.

Later timelines depict an adult Rena attending Gogura University alongside Keiichi and Mion in a curse-free world. The Rei arc details a magical mishap where she accidentally ingests a red magatama, inciting romantic turmoil until a shrine ritual restores balance. Spin-offs set in 2019 reference her son Kihiro, though specifics about his father or her adulthood remain undisclosed.

Rena’s fierce devotion to loved ones clashed with psychological fragility, often expressed through self-harm or aggression. Her steadfast belief in Oyashiro-sama’s curse and hatred of deceit persisted even as she matured into a more balanced adult. Recurring motifs—a bloodstained cap used to signal warnings, the vehement cry of “Uso da!”—underscored her turbulent psyche.