I-401

"Good day, Admiral. I'm I-401, the second ship in the special submarine series. Just call me Shioi."

- I-401 The Sen Toku-class I-401 was once the largest submarine in the world. It was commanded by Lieutenant Commander Nobukiyo Nambu of the Imperial Japanese Navy during World War II. Capable of carrying three two-seat Aichi M6A1 "Seiran" (Mountain Haze) float torpedo bombers, the Sen Tokus were built to launch a surprise air strike against the Panama Canal.

Personality
The personification of submarine I-401, as portrayed in Kantai Collection.

Her nickname is "Shioi" (401 in goroawase).

Trivia

 * 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.