The Fëanor inside Fëanor Sons

[Lalaith]

was apparently the son of Feanor closest to Aredhel

Interesting take, Ang.
I'm not saying you're wrong, about the romance aspect, but I always took a different view, that the friendship was platonic, nothing more. And that was something I always saw as a redeeming feature of Celegorm, any chap who is willing to hang out with (ie hunt with) a girl as a friend and equal can't be all bad. Makes his lousy behaviour to Luthien all the more disappointing.
Anyway, this is a splendid thread and I must peruse more closely.