User blog comment:Samuelshadow16/Ironwood's REAL purpose/@comment-10390252-20140817170018

I'm thinking that Penny's function is to be the weapon that can defeat any and every Hunter or Huntress. They're the only wild-card of sufficient power that can derail this scheme. The problem? No-one ever anticipated that giving her a soul would give her the ability to create her own moral structure that could override her programming.

I'm still betting that Ironwood will murder Penny when she refuses to hurt her friends.