Obviously she needs more trash bags. ;)
I'm a secret santa for this really critical girl and so far I've given her two bags of candy this week for her clue and she always trashes my gifts. I have no idea what to get for the final gift! She's into anime but that's out of my reach? (she is almost 16 and I'm 14)
What sort of "clue" is a bag of candy?
Is it supposed to be a "clue" to your identity (you eat lots of candy) ... Or a "clue" to her present (which then should be something related to candy)?
Toothpaste and a toothbrush after all that candy? Honestly, if she is that critical just get her what you can afford, don't invest to much time in trying to impress her or buy her approvable, it sounds like you will not achieve it anyway, she may just like being ungrateful, and impertinent.
Buy her a crater on Mars. There's this website called Uwingu, where you can buy one for as little as $5, and print out a certificate on cardstock.
Stop giving her gifts, she seems like a ****. You should get better friends.