It's very orderly it matches the complete character of Radagon in terms of a symbol and i do think a bit of the character is represented in the design because the scar seal item goes on to Elden Ring Items clarify that "these seals represent the lifelong duty of those chosen by the gods", so maybe the seal represents the type of duty that the character takes on so we know that Radagon takes on a sort of repairing role at some way, the stronger version of the scar seal is the so reseal and it goes on to read "solemn duty weighs upon one beholden; not unlike a gnawing curse from which there is no deliverance" and the red seals on these eyes become so embedded in the eye that the shape of the seal becomes barely recognizable at this point it's a heavy-duty indeed.

Marika’s Seal

Of course, Marika has seal talismans as well, as with Radagon, the talismans reveal the shape of her seal - crucifix. You would have seen this crucifix all throughout the lands between, it's present in every area as the symbol of the summoning pool, but beyond that, you'll find a ton of crucifixes in limgrave especially, where there are countless undying, screaming bodies pinned up. You could interpret this as her being in shackles for shattering the Elden Ring, the beast also likes to punish us with a crucifix of its own, but beyond these shackles, it's undeniable that the pose did become a symbol of her entire reign. The vertical line coming down through the center of the Elden ring is present in almost all of the great runes symbols, and it really helps you when you're trying to best site to buy elden ring items align them all back together in photoshop to form the shape of the Elden ring.