[@Noxx]

Nope. The field only limits the área where her time shift ability is currently affecting. Basically a "Poison free" zone. But anyone can walking in If they want

There are in fact a protective barrier (the tarot cards) spinning around her and the thorn dices are pretty much cuting and punching holes into nearby leaves/branches/trees. But they are only surrounding her and Celia.  Not a very big radius. 
Purely defensive Abilities too. Well, the dices are more of an... Active defense buuuut...