Ep. 10: Iona sacrifices her mental model to save Gunzou while Kongou is relieved of duty.
Aired on December 10, 2013

After I-401 sinks due to damage from her sister ships, Iona cares for the injured Gunzou while Takao searches for them amidst jammed communications. Although Gunzou orders Iona to abandon him to complete their mission, she refuses until he stops responding. Iona then dismantles her mental model to create a survival pod for Gunzou and her core. Takao finds the pod and sacrifices her own body to restore Iona and the I-401, bringing them to the surface. Kongou, eager to fight the surviving I-401 again, is relieved of duty by I-400 and I-402 for erratic behavior. During this process, Kongou discovers that Maya’s mental model is merely a fake artificial intelligence without consciousness, created solely to monitor her.
Episodes
- Ep. 6 · Haruna protects Makie with Kirishima's aid while Iona arrives and Takao awakens.
- Ep. 7 · The I-401 crew reaches Iwo Jima base where Hyuga and Takao await their return
- Ep. 8 · Hyuga negotiates with Kongou's decoy while Gunzou prepares to deliver a vibration torpedo to the United States.
- Ep. 9 · Hyuga and Takao defend against Kongou while Iona and the crew execute a complex escape plan.
- Ep. 10 · Iona sacrifices her mental model to save Gunzou while Kongou is relieved of duty.
- Ep. 11 · I-401 evades Nagara ships while Takao joins systems and Iona faces sisters and Kongou
- Ep. 12 · Kongou attacks the American Fleet while Iona boards a torpedo to reason with her directly.