MaiHikari: I've posted similar to what you've said... but ani_d and the rampant (raging) Ranka shippers ignore it in favor of 'Alto will charge in to rescue her, because he's the hero'.
Still, Sheryl's Vajra-AIDS is definitely different from Ranka's Vajra-bits, especially as we haven't seen Sheryl grow a light-stick in her belly.
Similar properties, but different mechanisms.