Currently working on a spoilerish piece that includes this little guy right down here. 
     
I won't say much about it once it's done, there will be a short little story through Dax's point of view. I will however say just four words, see if you can understand the storyline to come.

Words are 'Millennium' 'Remains' 'Squad' and lastly 'Cicatrix'  

Have fun