There are two bands/groups that share the name Aruna:

Aruna is a brazilian rock band based in Santo André, São Paulo. They gathered in 2008 and their sound is a mix of heavy guitars with lots of vocal layering and spicy keys/synths.

Portal, the short‑lived band founded by Cynic members after their first dissolution back in 1994.

http://www.metal‑archives.com/band.php?id=10853

http://www.arunamusic.com/main.html