Renji Ii serves as a supporting character in the series and competes as part of the rival idol group Gentlemen alongside Sawao Soda, Etsurō Aizome, and Ui Hakosaka. He merges adult wildness with an undercurrent of cuteness, a combination that fuels the group's competitive dynamic against the main ensemble. His surname "Ii" translates to "well, mine shaft, pit," while his given name "Renji" carries the dual meanings of "lotus, water lily" and "officer, boss," creating an etymological contrast between natural imagery and authoritative connotations within his character.