gembond FTW! it looks nice with the colors and it pops out

circuit, runes, smoke and thylacine also work (pretty much all terts work but those look best imo with her colors)
BUT they dodn't pop out like gembond does, and if you intend to dress her up with apparel, I think the tertiary might even get lost? which is why I wouldn't recommend runes

my personal vote is gembond, followed by smoke