Lúthien will now join the nocturnal conversation between Galadriel and Melian, providing that genuine and sincere kind touch to the narration, for she is a maiden of pure heart herself, alien to hatred of any sort or even resentment, if not for the crimes committed by Melkor and his numerous minions. She's also far from sheer ambition, when it solely encompasses power and the longing for might, which is a very recurrent of a theme in the entirety of Tolkien's writings. Lúthien is thus reluctant to fight, unless it is for a just cause and for love, the latter being the paramount thread that is to characterise her iconic deeds and unite all these aspects together, in a sole epic saga. She therefore brings buoyancy of the sincerest type, that's for sure, toning down the discussion a bit and making it more amicable in general terms. In my opinion, she also embodies in the perfect manner that innocent trait of the people of Beleriand, who just desire to live in peace and to be left alone, as much acquainted with the Evil's snares they had got in time. Alas, doom is to be upon the realm of Doriath and very grim moments are ahead of those noble characters.