DashiDog
http://farm5.static.flickr.com/4152/5045199266_922d7e7428.jpg
Dashi Dog was confirmed to be an octonaut on the 29th January on the official Octonauts twitter feed.
It's unknown which language she uses for live coding, but she is [known to http://twitter.com/#!/Octonauts/status/29005683059855361 write applications in Perl].