The answer is
11
Deusovi solved the first part of the puzzle
which gave the instruction "Braille".
The next step is to
look at every single letter in a given rotation. These all form letters in braille.
As an example, the Y's in the upper left corner form the letter W like this
The orientation of the braille letter is always the same as the orientation of the original letters.
Most of the ambiguities in the letter orientation are solved by this step since the other orientations wouldn't give valid braille letters. However, the Is pointing west/east are not solved, nor is it clear, which letter the leftmost I belongs to. Also, the orientation of the NE/SW pointing Is and the NW/SE pointing Os is unclear. Finally, it is also not at this point clear whether the Js pointing west form the letter B or K.
The list of the braille letters (ordered by the original alphabets and orientations going clockwise starting from N) is as follows
At this point, we can see words forming from the solved letters and resolve any ambiguities to get the following message
"Who unwittingly unlocked the rift to the Upside Down?"
This is a reference to the series Stranger Things, and the answer to the question is Eleven.
One final thing to note is that as MacGyver88 pointed out in comments, the letters are also in the font of Stranger Things.
OP also pointed out in the comments below that there are multiple references to the final answer hidden in the puzzle
There are 11 characters in the title (not counting the apostrophes).
There are 11 characters of each colour (as mentioned in Vickys answer).
Some characters have a black fill, not showing the starry background. These form the Roman numeral XI (image by sarsaparilla)
