Board Thread:Speculation House/@comment-27883360-20160305074527/@comment-26397825-20161107075444

...In Grimm Eclipse, Blake is also completely unaffected by hits and can keep attacking without interruption, and also teleports. Weiss can heal her allies with a freezing wave of dust, and builds special attacks twice as fast as anyone else.

Grimm Eclipse is a game, and so things were created from a gameplay perspective to give them something they can do. The abilities they show in the game are non-canon for the RWBY girls (though some of them do come from the show such as Blake's blade beam and Weiss's magic missile attacks), and JNPR is no exception.