i was thinking this!! the nameless is the evil part of lloyd’s soul, while the llyod we know is the good part (aka. the magic obsessed part of him) which is why we don’t see llyod actively seeking revenge or why he forgot all about sias
It probably is related to Lloyd. There is subtle hint that when alberto visited the previous Lloyd’s grave, the grave stone has shifted like something came out of it. The first prince noticed it.
Could it be that nameless was a piece of Lloyd's soul too? Probably his side that seek vengeance for being weak? Just a thought...