And i have proof! but its porbably not what you expected. The spartan is Dare, but she isnt a MC type spartan (aka Spartan II), she is a Spartan I. Bungie told us this in one of thier old SI transmissions back in september, Here is the link. towards the end, we get this quote referencing Dare:
[SMN.ACTUAL]: "Didn't think you S1 types ever left your cave."
Clearly S1 means spartan 1, just like SGT Johnson. and just like the Sarge, Dare is classified across the board.
If this was already found, sorry, but i didnt find it when i used the search.