Mars is now referred to as Aqua, the water planet. Enter Akari, who leaves Earth for Aqua to become a gondolier, known on Aqua as an undine. "Aria Volume 4" continues following Akari on her adventures as she learns about the many facets that make Neo-Venezia such a unique and wondrous place.
- ISBN10 142780513X
- ISBN13 9781427805133
- Publish Date 2 December 2008 (first published 6 April 2004)
- Publish Status Active
- Out of Print 28 September 2011
- Publish Country US
- Imprint Tokyopop Press Inc
- Format Paperback
- Pages 192
- Language English