Sarah and Saskia as Meruru and Kanako Kurusu from Stardustwitch Meruru (which is an anime in the anime series My little sister can't be this cute)
This isn't really comic canon so to say xD
the idea came up during a stream and I just rolled with it :D and I know Sarah would fit better in the other witches role! but I already inked when I noticed and didn't want to change it ;3
Link
KernelCore
Adorable x3