As others have said, your art is always consistently amazing, and this is no exception!
The two biggest problems I have with the piece is that the shields seem a wee bit too large, and also that Gaaki seems a little too bright compared to her teammates (or, perhaps her teammates are too dark?).
Also, rule 4 states that any custom masks must have front, side, and top views drawn
EDIT: I see you’ve added the additional pictures. Good luck!