Enishi Shijima, 32, is the son of Kissuiso inn owner Sui Shijima, younger brother of Satsuki Matsumae, and uncle to Ohana Matsumae. As the designated successor to Kissuiso after Satsuki's departure, he serves as the inn's manager under Sui's ultimate authority. His childhood featured frequent distress during conflicts between Satsuki and Sui, often causing him to cling to Satsuki's leg and cry. Satsuki bullied him throughout their youth, forcing him to complete her summer homework and confiscating his Christmas money.

Enishi attended university with business consultant Takako Kawajiri, developing a clear infatuation that manifests as unwavering dedication to her suggestions for modernizing Kissuiso. His management approach, favoring Takako's ideas like new waitress uniforms, contrasts with Sui's traditional methods and often leads to rejection despite his position as second-in-command. This fuels his insecurity about his capabilities and childhood reputation as a crybaby, driving his desire to prove his competence, though implementation of his plans frequently encounters practical challenges.

His relationship with Takako evolves into marriage, signifying growing confidence as his infatuation transitions to partnership. Following Kissuiso's eventual closure, he focuses on improving his management skills to properly succeed Sui. During critical incidents like the extended power outage depicted in *Home Sweet Home*, Enishi participates in staff efforts to maintain guest services. His evolving maturity is evidenced by gradual reconciliation with his family legacy, moving beyond past resentments toward Satsuki and embracing his role in Kissuiso's future. His surname "Shijima" (四十万) translates to "400,000," while "Enishi" (縁) means "edge," "fate," "relation," or "bond."