|“||Good day, Admiral. I'm I-401, the second ship in the special submarine series. Just call me Shioi.||„|
She wears a school swimsuit with a name tag under a white and orange sailor collared shirt. She has medium-short brown hair in a ponytail secured with a peculiar hairclip along with brown eyes and a noticably tanned complexion.
Her nickname is "Shioi" (401 in goroawase).
- 2013 Christmas event special map E3 completion reward.
- Calling herself Shioi. While the "shi" and "i" in her name stands for 4 and 1 in Japanese respectively, the "o" in her name is just pronounced as the letter instead of an abriviation of the number 0.
- Her design was shown in the endcard of Arpeggio anime episode 1 that aired 8 October 2013, two months before she was added to the game.
- Commissioned 8 January 1945.
- Expended as a target ship, off Pearl Harbor, 31 May 1946. Wreck found in March, 2005.
- She was used as a target ship by the US Navy was to prevent her from falling into the hands of the Soviet Union before the Cold War.