: A significant subplot involves Aina Yoshiwara , who mistakenly believes Iori and Chisa are engaged in "shady" activities when she catches them practicing together in private. This leads to a classic Grand Blue misunderstanding involving Aina, Chisa, and Iori that eventually results in physical comedy.
: A major comedic and technical hurdle for Iori. His difficulty with clearing water from his mask under pressure becomes a running gag, though it highlights the real-world challenges of scuba diving. Grand Blue Episode 11
Critics and fans highlight this episode for its balance of and its signature raunchy humor . The "scary faces" and over-the-top reactions remains a staple, making it a fan-favorite for those who enjoy the series' unique blend of sport and surreal comedy. : A significant subplot involves Aina Yoshiwara ,