Quite surprised of not seeing this in many decks. For me is one of the best allies in the game. Thougness is awesome, and it has good stats. It can easily block you an attack, Thwart/attack two times, and then be sacrified to block another attack. Taking 2 villain attacks and attack/thwart of 4 at the cost of 4 resources looks like a good deal to me.
I specially like it in Nadia Van Dyne's decks, as it can be recycled with G.I.R.L.
Also, I'm not 100% sure of how it interacts with Rapid Response. I'd say that it enters play with a Tough token and then, that token is removed by the Rapid Response text. Can anybody confirm that at 100% ?