Throughout the game you can find various Vanity Items in chests, ranging from common objects to very rare ones. These items can’t be equipped and don't help in battle, but at the end of the chapter these items are added to your collection and provide a Spirit Energy reward. You can increase the quality of Vanity Items in chest by doing as much damage as possible, as quickly as possible. Meaning you can get a higher ranked item the faster you open the treasure chest. There is a total of 5 Vanity Ranks: C, B, A, S and SS. It should be noted that smaller chest will drop the C and B ranked items while bigger versions of chest will drop items ranging from A to S but can rarely drop a SS item.
Thankfully there are multiple ways to farm these treasure chests if you're missing items:
1. If you're missing the ranked C or B items, then it's best to replay Chapter Two: Powerless. This chapter has a lot of chests in it, but if you just want a particular item. Get to an alley with a chest in it and collect the item, the area will end up getting sealed off and two enemies will appear to kill Korra. Simply let these two enemies kill you if you didn't get the ranked C item you wanted. You will restart at the last checkpoint and it doesn't take long to get back to the same location again. Rinse and repeat this as much as you want until you gotten the ranked C or B item that you needed. Once you do obtain it, don't forget to finish and complete the Chapter for it to count towards your collections.
[If you have the Aang's Travel AirBall Press
x2 fast to zip through the level quickly.]
2. If you are a player who needs the higher ranked items (A and S, but can include the rare SS item) then farm them on Chapter Six: Spirits Rising. At the start of the chapter, get to the first treasure chest behind a breakable stone wall and an Air barrier, but before getting this chest make sure you trigger the auto save point check point by going a little further up the hill. Now turn back around and let the dark spirits kill Korra (make sure you have about four items have HP 1/2 equipped on you). You'll respawn back on the hill, so turn back around and get the chest all over again and dark spirits will appear. Let them kill you again until you get the desired ranked A or S items you wanted. Once you do obtain it, don't forget to finish and complete the Chapter for it to count towards your collections.
3. If you're missing the SS item it can be obtained from the final boss fight on Chapter Eight: Old Foe. It doesn't matter which difficulty you fight the final boss on because if you achieve either Gold or higher medal, then you'll be rewarded with the SS item called: Avatar Wan's tea pot. It should also be noted that this item can drop from any chest in the game as long as it was a big treasure chest. it's a rare chance of it happening but it can. It can also drop from farming method number 2 as listed above.
Below is a list of item names in the exact order in rows:
1. Cabbage, Wanted poster, Water Tribe necklace, Blue spirit mask, Rally invitation
2. Yuan, Exterminator pack, Airbender head shaver, Telescope, Airbender glider staff
3. Fried Fish, Flower basket, Papaya melon, Radio, Amon's mask
4. Earth Kingdom dice, Pentapus, Tui and La, Gramophone player, Pai Sho piece
5, Dragon kite, Mover poster, Stuffed animal, Electrified glove, Avatar Wan's tea pot