User blog comment:Maki Kuronami/Lesson 26: UNDERGROUND CRIMES IN UNDERGROUND CITY/@comment-5217560-20141010031927/@comment-10380701-20141010035400

In theory, Weiss' semblance, in its purest state is the ability to push away others.

My theory is that having been sheltered by her family, she's been isolated away from having a lot of friends.

This manifests as a glyph that protects her, or attacks for her; Her dad gave her everything she wanted.

So her glyph can do a lot of shit with the help of Dust.