Ram is a demon from the Re:Zero universe integrated into the Isekai Quartet crossover setting. Born with her twin sister Rem in a demon village where twins faced execution due to cultural taboos, Ram manifested extraordinary infantile magical power. This led the village to revere her as the reincarnation of the demon god, sparing both sisters. During a Witch Cult attack that destroyed their home, Ram fought to protect Rem but lost her horn when distracted by Rem's appearance, permanently diminishing her potential. Roswaal L. Mathers intervened, saved them, and later employed them as maids. Ram exhibits a blunt, lazy demeanor and takes pride in her idleness, though she performs her duties seriously when required. She displays deep loyalty and romantic feelings toward Roswaal, defending him and reporting misconduct like Kazuma's attempted theft. She is highly protective of Rem, openly praising her talents and focusing on her growth. Her interactions with Subaru Natsuki are consistently antagonistic; she insults him frequently, misnaming him "Barusu," and expresses disdain for his preferences or actions, such as refusing to share his choice of chicken wing seasoning to avoid association. Within the Isekai Quartet school setting, Ram adapts to classroom dynamics while maintaining her core traits. She uses Cocytus as a shield to slack off during activities and collaborates with him to condemn others' performances. During events like the talent show, she criticizes Subaru's act as "lame" and supports Rem's flail demonstration. She participates in combo moves with Rem during the dodgeball game, which are deemed illegal. Her partnership with Viktoriya Serebryakov ("Visha") on lunch duty is functional, though she finds Visha's eating habits unsettling and keeps her hornless status a secret. She also interacts impatiently with Pandora's Actor due to his association with Roswaal. In the film *Isekai Quartet: The Movie – Another World*, Ram is transported via a wormhole to another dimension. She joins a group including Mare, Aqua, Rem, and Naofumi, escaping golem attacks and eventually reaching a village. Later, she reunites with other classmates and participates in the collective effort to combat a destructive golem, though her specific actions during the battle are not detailed.