Nagisa Saitō (斉藤 渚 Saitō Nagisa) is a worker at the Lemon Beach House. It was said in her first appearance in Episode 3 that she loves surfing and works at Lemon for the reason to do it more often. She is the only person who is scared of Squid Girl.
Nagisa has dark blue hair and gray-blue eyes. She wears the Lemon work uniform and a black bodysuit when surfing. She is described as "angelic" by Squid Girl.
In "Won't you cosplay?", Eiko dresses Nagisa up as a guy to attract more female customers to the shop. Nagisa often thinks that Squid Girl has done something to the people around there to continue her 'Inkvasion' plan.