I find insipid to perhaps be the most fitting of her name (based on what I know, I'm only on chapter 13). The word Insipid describes the lack of something. Insipid wants everything because she lacks everything. Beauty, intelligence, value as a living thing, ect. She's a waste of space, time, and thought and she subconsciously knows it.
If only Insipid were...less shallow... her Retro-Benefaction could easily be used to its fullest and give her team the distinct advantage in every fight. Not that I'm saying she's currently useless or anything, though she did kind of screw things up during the battle in the Goldridge Mountains by surging everypony and not just her cohorts with power and please don't kill me