Elvŷr doesn't fully charm everyone, but she's able to keep Thingol from outright forbidding any association with his daughter. She keeps their relationship apparently platonic and appropriate when in full view of everyone else - but slips away with Luthien into the woods quite frequently, especially as her wife grows into her full height and body.
They have a wonderfully long time together in the woods of Beleriand. Elvŷr takes Luthien with her to meet with her lieutenants in short bursts, acquainting her with Sauron, setting the seeds for her followers to view Luthien as their Queen, any opposition of Luthien to them as part of some grand trick upon the Free Peoples.
(She, admittedly, mostly enjoys time to be Mygwainor, to act as Luthien's wife around others. Though seeing Maiar and orcs, trolls and young dragons and monsters galore, all prostrating themselves at Luthien's feet is... Certainly something.)
(She makes Luthien a dark and beautiful throne, for all that they almost never use it. It's not too much work, and seeing Luthien on it leaves her quite star-struck. Which, admittedly, makes holding court here awkward.)
Elvŷr is away more often once her simulacrum is released in Aman, leaving her elven body sleeping near Luthien while her consciousness jumps to her divine form whenever she needs to make friends or more cleverly manipulate something. She befriends Finrod again, of course, sometimes complaining about him to Luthien. (Unmentioned, but running like a current through it - she finds being in Aman without her wife, without the joy of their 'good timeline,' very, very stressful, and she takes to having the simulacrum do everything except talk to Finrod.)
But the time for Melkor's plots in Aman to be discovered - the time for the war in Beleriand to start - is approaching, now.
(If Luthien wants... She thinks she can steer the war to be less devastating to the people of Beleriand before Melian raises the Girdle, and before the Noldor arrive and begin their siege, without significant timeline stress - the exact casualties are mostly unimportant, as long as the war disrupts politics and trade which the Girdle will do regardless, and the timeline has a lot of room to correct any small bumps, here.)