Miku Aihara is a quiet, introverted figure gifted with complete invisibility after an extraterrestrial entity granted her wish. This power cloaks her not only from sight but erases all detectable scents, though its full limits remain undefined. Her appearance features long dark hair and glasses, and she habitually drapes herself in a sheet to indicate her presence when visible. As part of Sayaka Koyanagi’s group, she avoids engagement with newcomers, often retreating into invisibility. When Clair Aoki and Shuichi Kagaya join, Miku materializes momentarily to introduce herself before vanishing again, avoiding prolonged interaction. This pattern highlights her preference for solitude and discomfort in social settings. Official sources provide minimal insight into her past before her ability or expanded development in spin-offs. The narrative emphasizes her role within the group, framing her invisibility as both a shield against external attention and an extension of her reclusive nature.