Person (Essence)? First of all, will you PLEASE forgive me for stating that Jesus was the "Logo" of the "Logos"?...
... for that does not do The Express Image of the Essence of God....Justice....and besides...Jesus is not the Logo, He is the LOGOS of the Everlasting Father !...So again please forgive me for taking the "play" on that "wordplay". : )

So then... what does it really mean that Christ, His Son, manifested in the flesh as Jesus of Nazareth, IS "the Express Image of His Person", in whom "dwells all the fulness of the Godhead bodily" ?

Who being the brightness of his glory, and the express image of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high; Heb 1:3

Interestingly, this word for "express Image" is ????????? "charakte?r"
khar-ak-tar'
From the same as G5482; a graver (the tool or the person), that is, (by implication) engraving ([“character”], the figure stamped, that is, an exact copy or [figuratively] representation): - express image.

AND... this word for His "PERSON" is ??????????? "hupostasis"
hoop-os'-tas-is
From a compound of G5259 and G2476; a setting under (support), that is, (figuratively) concretely ESSENCE, or abstractly assurance (objectively or subjectively): - confidence, confident, person, substance.

What are your thoughts on these things...?