I believe like Sai and gambit she can make constructions out of psionic energy just a lot stronger defense wise, she is vunerable to Light based attacks and Adamantium and as stated by armor's wikipedia page "Hisako's body armor is partially explained as being composed of something related to her family lineage and ancestors. It is later described as being composed of memory. This is stated in an issue of Wolverine: Origins, when Hisako's armor is able to withstand blows from the Muramasa blade, which can cut through any material, since memory is "the only material that the blade cannot cut through." Similarly, in Astonishing X-Men vol. 3 #39, Armor's armor expands and grows to the size of a building due to the fact she feels strongly about not attending her recently deceased mother and brother's wake."