I-400
One of Iona's triplet sisters, I-400 operates directly under Yamato's command. She's known for her unwavering loyalty and polite demeanor, though she doesn't say much. Fans often note that her quiet nature fits her role perfectly—she's genuinely skilled at espionage work, whether operating as a submarine or in her Mental Model form.
Content compiled by AnimeList.moe from publicly available sources.
