[Gil-Galad]

to me, i see Elrohir and Elladan... the darkness could refer to when their mother left them and they were sad... and they were ever present in the lives of man, mainly aragorn


but now that a read it, and reminding myself it is a riddle, Glorfindel comes to mind


Me and brother mine - both glorfindel could've been brothers
by pure hearts we were born. - as elves
Strong and tall we are - glorfindel has always been referred to as tall and strong
though darkess took us both. - glorfindel fighting blarog then fighting nazgul

Bearer of fire he
while I bear twice our name
we stopped the men of fame
we're here to watch and see - did not help the quest or men

Me and brother mine
so much close we are
but wall is between us
until the King's day comes.

can't really explain rest right now... but Glorfindel could be "time brothers"