DashiDog
http://farm5.static.flickr.com/4152/5045199266_922d7e7428.jpg
Dashi Dog is a member of the octonauts, and was confirmed to be a live coder 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 write applications in Perl and use UNIX, in particular the C shell for route finding, oddly enough.