OVA
Description
Rika Tokino works alongside her older brother Kazuto, assisting in the daily operations of their family's Tokino Bath House. She acts as the pragmatic anchor amidst the bathhouse's frequent chaos, often playing the "straight man" to absurd situations. Financially driven, Rika deeply worries the bathhouse is a "money pit" threatening the family with debt. This concern manifests in extreme ways, such as her readiness to sell Valkyrie when offered money, though the deal collapsed due to counterfeit currency.

Academically focused, Rika studies diligently to gain entry into a top high school and eventually university, linking this effort to her goal of long-term financial security. While skeptical of Kazuto's determination to keep the bathhouse running, she respects his perseverance and contributes her labor to its upkeep. Her social life garners little priority, initially rejecting a popular classmate's advances before forming a friendship.

Rika cares for Kazuto but grows frustrated by his occasional obliviousness. She views Valkyrie positively as a friend despite minor annoyances. She addresses Princess Mehm as "auntie," approving of Mehm's support for Valkyrie and Kazuto's marriage, which Rika sees as a chance to "marry into power" for economic relief. A solid friendship exists with Akina Nanamura, though Rika questions Akina's preoccupation with appearance. Initial wariness about Sanada's motives gave way to a good rapport, despite Sanada's eccentricities.

Rika actively manages bathhouse operations and adapts to disruptions caused by alien visitors, maintaining her pragmatic outlook. She views major events, like Valkyrie and Kazuto's wedding, primarily through the lens of potential economic benefit. During Season 3, she participates in activities like treasure hunting rituals with others, integrating into adventures without losing her practical focus.

In Season 4, following the Princess Mural incident that split Valkyrie into separate adult and child entities, Rika continues her supportive role at the bathhouse. Her interactions with both Valkyrie forms retain the established dynamic of friendship mixed with minor irritation. The wedding's postponement continues, aligning with Rika's persistent view of its financial implications.