Star guardian lux- What would her With form be

We all know that magical girls succumb to despair https://s-media-cache-ak0.pinimg.com/originals/94/87/ce/9487ce5d6fc7c5976e7684c728dd2bae.jpg http://25.media.tumblr.com/6d3d030d423de6afe72b2938be38f739/tumblr_mifdgp0MJc1qjlwa8o1_r1_500.gif

and Some of us that they become witches when they succumb to despair http://24.media.tumblr.com/b8305146dc41a3aff95bf8164c75579e/tumblr_mlblw8XkS61rrfxmfo7_250.gif

but my question is What would Star Guardians witch form would look like o.o