AU where Ed had been wearing shades, having taken a note out of Greed’s book of fashion in hopes people would assume this ‘way cooler’ of the two when seeing him and Al together would know, he’s the Fullmetal Alchemist.
Then Hohenheim has no clue and just assume’s he’s some kid visiting Trisha’s grave and keeps walking, none the wiser.
No one knows until Pinako calls them both idiots.