S.S. Naked Sun

"This is our very last piece!"

- Aikurō Mikisugi remarks before releasing the S.S. Naked Sun

S.S. Naked Sun is a thin bodied and wide topped carrier constructed with funding from the Takarada Conglomerate and is Nudist Beach's last line of defense; the organization released her as a way to rescue Lady Satsuki from Honnōji Academy, dubbed "Operation Rescue Satsuki."

The S.S. Naked Sun is dry docked in the underground Nudist Beach base under Osaka. During launch, the Doutonbori gate will open and Osaka will begin to part itself as the ship is lifted through the water to her floating position.

She is powered by several turbines resembling oversized Hamster wheels, with the crew being the hamsters. When run by Mako Mankanshoku wearing her 2-Star Goku Uniform, it was able to withstand the ridiculous amount of speed it was gathering.

In her closed form, she resembles a seam ripper, an item used for removing threads from clothing. Incidentally, Aikurō dubs it as the Great Naked Dagger ​and uses the aforementioned boost to help Ryūko destroy the Original Life Fiber, speeding right through it and blowing a hole on its back, leaving the Naked Sun's lower deck stuck on one of Honnōji Academy's walls, while the Blade fell into the City.

It was last seen when the cast had Soroi's tea and right before the last assault on Honnōji Academy.

The S.S. Naked Sun is seen again in Episode 25, in Great Naked Dagger form. It was wielded as a weapon by the Honnoji Academy "Last-Stitch Defense System" activated by Rei Hōōmaru to take vengeance on the perpetrators of Ragyo Kiryuin's death, but was quickly destroyed by the Rending Scissors' Final Graduation Mode.