I-400
I-400, nicknamed Shion, is a shipgirl from Kantai Collection who represents the lead vessel of the Sentoku-class submarine aircraft carriers. As the eldest sister of her class, she acts as a caring leader for the submarines of the First Submarine Division. She blends polite, ladylike manners with an approachable demeanor, taking pride in her role within her fleet.
Overview
I-400, nicknamed Shion, is a shipgirl from Kantai Collection who represents the lead vessel of the Sentoku-class submarine aircraft carriers. As the eldest sister of her class, she acts as a caring leader for the submarines of the First Submarine Division. She blends polite, ladylike manners with an approachable demeanor, taking pride in her role within her fleet.
Appearance
She has long black hair extending below her waist with indigo gradient tips, grey eyes, and tanned skin showing tan lines on her upper body. Her outfit consists of a blue school swimsuit worn underneath a white sailor shirt featuring an orange collar and a short orange necktie. Her headgear features guards modeled after hydroplanes, with the left ear piece shaped like a conning tower. Her rigging includes torpedo tubes mounted on her back, an aircraft hangar slung over her right side, and a leather holster on her left thigh holding a single-barrel gun. When moderately damaged, a military sword in a purple sheath becomes visible on her right hip.
Personality
She possesses a strong sense of responsibility as the eldest sister, taking good care of those around her. While she speaks politely like a refined young lady, she is practical and skilled at household chores and massages. She has a huge soft spot for butter rice. Highly emotional and prone to tears, she tends to mutter softly to herself when flustered. She also exhibits a somewhat airheaded and clumsy side, occasionally overthinking her mistakes. With the Admiral, she maintains a friendly, equal, and close relationship.
Abilities
As a submarine aircraft carrier, she is capable of equipping and operating aircraft such as the Shisei Seiran. Upon undergoing modernization, she achieves exceptionally high night-combat firepower and powerful torpedo capabilities among submarines.
Background
She was introduced during a limited-time event in late 2017 as a drop in the third sea area. As the lead ship of her class, she leads her division in routine duties and sorties, reflecting on past operations that were never realized while building bonds with her fleetmates and commander.
Relationships
She shares a close sisterly bond with her younger classmate I-401, despite their contrasting personalities. She also acts as a dependable elder sister figure to I-13 and I-14 of the First Submarine Division. She interacts casually and warmly with the Admiral and treats her aircraft, the Seiran, with deep care and respect.
Trivia
Her phonetic nickname Shion stems from a Japanese wordplay on her vessel number. The sword revealed when she is damaged is interpreted as a protective charm, referencing the daggers historically presented to Seiran aircrews before missions as well as practical shipboard defense equipment.
