Also,since Whetu can prevent people from perceiving her presence,why doesn’t she get healing and then use that power at Aoraki in case anything goes wrong?And if things do go wrong, she can stab Akira in the back (literally).
Remember this line?
“She’s refused all medical treatment.” one of the guards said. “I think she’s just trying to let herself die. We were getting ready to sedate her and stitch up her wounds before you got here.”
It might be illegal to do something like that here in America, but I guarantee you after Queen Kendra left the room, Royal Army medics forced their way into the room, tranquilized Whetu, and then performed lifesaving surgery against her will.