Ep. 12: Squid Girl loses abilities after beach volleyball finals and meets Kozue Tanabe
Aired on December 21, 2010

Squid Girl and Eiko compete in a beach volleyball tournament for a 3D television, reaching the finals against Gorou and Tatsuo Isozaki. After Eiko injures her ankle, Chizuru substitutes and secures victory. Subsequently, Squid Girl loses her tentacles and squid powers, prompting friends to search for her. She returns with severed tentacles, accepting a human life, but Takeru clarifies this does not bring her happiness. While lamenting on the beach, she encounters Kozue Tanabe, who offers comfort. Later, Squid Girl and Eiko are trapped in a whirlpool created by Harris, Clark, and Martin. Squid Girl’s urgent desire to save Eiko restores her tentacles, enabling her to rescue Eiko from drowning.
Episodes
- Ep. 8 · Squid Girl battles a fever, strange cravings, and a sand castle contest with Takeru's friend.
- Ep. 9 · Squid Girl attempts a doorbell ditch, experiments with makeup, and causes chaos with a ray gun.
- Ep. 10 · Squid Girl displays artistic talent and assists Kiyomi's baseball team during a rainy day.
- Ep. 11 · Eiko discovers a moving doll while Cindy suspects Chizuru is an alien and the group hikes mountains.
- Ep. 12 · Squid Girl loses abilities after beach volleyball finals and meets Kozue Tanabe