Shuna was a beautiful but mutated human with an animalistic face and a coat of long, poisonous quills which covered her head, back and upper arms. She had the ability to launch these quills from her body at high speeds in order to strike at her enemies from a distance.
The woman who would come to be known as Shuna Sassi was taken in as a youth by an exotic brothel owner in Boston and set to work catering for rich men with exotic - and dangerous - tastes. After accidentally killing one of her clients with a careless touch from one of her deadly spines, Shuna was forced to flee Boston, and eventually found her way to Midian, taking refuge with the Tribes of the Moon.
Shuna was one of the few residents of Midian able to fight back against the Sons of the Free, and thus took part in the unsuccessful defence of the city, surviving the battle and escaping with Cabal and several other 'Breed.