Main character
Ionaイオナ
- appearances
- 4
- appearances
- main roles
- 3
- main roles

Iona at a glance
Iona is a main character in Aoki Hagane no Arpeggio: Ars Nova.
Also known as I-401, The Blue Steel.
Iona: quick facts
- Role
- Main character
- Also known as
- I-401, The Blue Steel
- First appearance
- Aoki Hagane no Arpeggio: Ars Nova (2013)
- Latest appearance
- Aoki Hagane no Arpeggio: Ars Nova Cadenza (2015)
- Japanese name
- イオナ
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Who is Iona?
Iona is the Mental Model of the Fog Ship: I-401 submarine. After the great battle, she was placed on stasis and given order to follow and obey to Chigaya Gounzo. She's one of the oldest Mental Models in existence and, having spent around two years with humans, she is one of the most versed in the human way of life. Unless she reveals her abilities, it is practically impossible to distinguish her from a normal human.
Biography excerpt via Kitsu.
Iona in numbers
- Appearances
- 4
- 3 as a main character
- On screen
- 2013–2015
- 3 years
Appearances by format
4 titles in total
- TV Series2 · 50%
- Movie2 · 50%
Appearances per year
New titles featuring them
Show as table
| Item | Titles |
|---|---|
| 2013 | 1 title |
| 2014 | 1 title |
| 2015 | 2 titles |
Appearances
More characters from Aoki Hagane no Arpeggio: Ars Nova
Iona FAQ
What anime is Iona from?
Iona is a main character in Aoki Hagane no Arpeggio: Ars Nova and appears in 4 titles in total, including Wooser no Sono Higurashi: Kakusei-hen and Aoki Hagane no Arpeggio: Ars Nova DC.
What else is Iona called?
Iona is also known as I-401, The Blue Steel.
When did Iona first appear?
Iona first appeared in Aoki Hagane no Arpeggio: Ars Nova (2013) and most recently appeared in Aoki Hagane no Arpeggio: Ars Nova Cadenza (2015).
What is Iona's Japanese name?
Iona is written イオナ in Japanese.
Where can I watch Iona?
Open the Aoki Hagane no Arpeggio: Ars Nova page for licensed streaming links and the full episode list.














