I know, their hair colors are gorgeous!

They really need to have flashbacks of Aunt Marie being badass! There's so much more we could learn about her. Or maybe bring her back to life or have her evil twin show up hehe. Oh the cliched possibilities...

I would watch a whole show about Aunt Marie, seriously. Her dialog was so well written with hints and inferences... even just the phrasing of the line "You have to hunt down the bad ones" has so much implied meaning (that not all the Grimm creatures are bad, for one; also the urgency of hunting them down, as opposed to "finding" them or even "killing" them).