Aokishi "Blue Knight" Ozaki, codenamed Blue Knight Blue, was summoned from the human world to Jewel Land as part of the KiraDeco 5. Originally a famous idol singer from Kobe, his declining popularity left him feeling empty due to lacking genuine friendships before joining the group. In Jewel Land, he resided in Garnet's mansion as her personal "sheep" and head butler, performing household tasks under her direction. Garnet's literal treatment of him as a sheep caused emotional distress. She later dismissed him in the series' final episodes, instructing him to use his abilities to protect women worldwide. This event materialized his Jewel of Fate, the Blue Garnet, granting a transformed state with enhanced capabilities. His combat style relies on leg-based techniques, aligning with his defender role. After his dismissal, Garnet gifted him an earring speaker that detects calls for help from women upon his return to the human world. His character evolved from seeking validation through fame to finding purpose in protecting others, accepting a broader mission beyond personal service.