These are the BGI fury: Akane and the BGI ninja: Jubei
They are a brother and sister ninja team with unique movesets and together they make 1 strong boss.

The original concept and models of the characters are by EdT, new movesets and new facial textures by Samer, the custom new moves (running kick throw and bk_fw_k are by Andrew.

For more info, screenshots, and if you have any questions visit: http://oni.bungie.org/community/forum/viewtopic.php?id=1409