The bio-reactor isn't her primary power supply.
As to field repairs, not as easy as that. You need specialised tools just to get in to those components (the skin's part of the armouring), and proper spares aren't in most stores (although you could kludge things with lesser grades). Quite frankly, outside those components with access hatches anything else is a bit dangerous to do without a cybernetics shop if the internal self repair won't cut it (which can be the case if you're in a hurry). If she's in that sort of situation expect a PO'ed Scarlet Angel demanding to know why she didn't have proper support. Probably after leaving a mess getting Shizuka out of it.
Structural work is actually easier, as by that point you're replacing body parts.
As to field repairs, not as easy as that. You need specialised tools just to get in to those components (the skin's part of the armouring), and proper spares aren't in most stores (although you could kludge things with lesser grades). Quite frankly, outside those components with access hatches anything else is a bit dangerous to do without a cybernetics shop if the internal self repair won't cut it (which can be the case if you're in a hurry). If she's in that sort of situation expect a PO'ed Scarlet Angel demanding to know why she didn't have proper support. Probably after leaving a mess getting Shizuka out of it.
Structural work is actually easier, as by that point you're replacing body parts.