Are Memory Crystals new?

Going into this game i figured that every character was capped at level 100, standard RPG format. however when i entered into a FFIX event to get Vivi and Garnet the Elite stages offered rewards for getting Memory Crystals which apparently allowed one to pass the Level Cap. there was also an event to get Tidas's Memory Crystal.
Now i went into an event a while ago and got Vanille, i looked at all the other prizes to see if it was worth my time trying to get them at my current level and didn't see any Memory Crystal for Vanille.
So i am wondering, are these Memory Crystals a new feature? if so how do i get Memory Crystals for characters i got in previous events (ie. Vanille) and for the characters unlocked playing the normal levels? (ie. Cloud, Rydia etc.)
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How rare are memory crystals in Greedfall?
To reset one's Skills so that the player can spend them more wisely, one must use a Memory Crystal. These gems are very rare, so, when acquiring them, be sure to keep them safe and not spend them unnecessarily. There are 3 that can be found in the game, and each one can only be obtained as a drop from specific bosses.Do crystals store memory?
Coin-sized slivers of glass like this one can store up to 360 terabytes of data for billions of years, Mashable reports. The storage devices, nicknamed "superman memory crystals," consist of nanoscale dots embedded by a laser in layers of quartz.How many memory crystals do you get in Greedfall?
There are only five, so players will want to hold onto any they come across until they're absolutely sure they want to respec. Here's where to find every Memory Crystal in Greedfall.Do crystals hold data?
Yes.Holographic data storage uses crystals to store data.Superman Memory Crystal: Storing Data For 13.8 Billion Years
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Images: Ketut Subiyanto, Samson Katt, Ketut Subiyanto, Katerina Holmes