Tomoe Wajima, a 28-year-old head server at the hot spring inn Kissuisō, balances sharp professionalism with a curious, gossip-driven nature. Tasked with overseeing new employees like Ohana Matsumae and Nako Oshimizu, she mentors with a blend of strictness and approachability, deftly managing responsibilities while eavesdropping on guests and colleagues to fuel her playful nosiness. Beneath her composed exterior simmers quiet pressure from societal expectations: her mother’s persistent reminders to marry underscore her status as the sole unmarried member of her former social circle. Though she halfheartedly dreams of a wealthy partner, her devotion to Kissuisō eclipses personal pursuits, anchoring her priorities firmly to work.

Tomoe insists younger staff address her as "Onee-san" (older sister), rejecting the formal "Senpai" to cultivate camaraderie and cling to youthfulness. This informal title mirrors her mentoring style—guiding Ohana and Nako with wry humor, casually divulging coworker quirks during their orientation. Her interactions weave authority with relatability, softening hierarchies without eroding her role as a seasoned leader.

Her narrative arc remains rooted in Kissuisō’s daily rhythms, eschewing dramatic transformation for steady presence. Workplace dynamics and comedic mishaps stemming from her curiosity define her contributions, reinforcing her as a stabilizing yet mischievous force within the inn’s community.