#so that just leaves like four other unknown sybols there

[myopinionisimportant]

On my latest replay of Control I've been a bit more thorough about checking every little corner, and I found a document I hadn't read before

regarding a Surfboard that gave immense self-confidence, and with the force of advertising from its owner Mr. Bless, attracted large crowds to use its power

So that's the origin of the Blessed, right?