The concise version of this is that I [name]LOVE[/name] [name]Vesper[/name] for you, I think it fits the bill of what you are looking for perfectly. Everild, Ferelith, [name]Pomona[/name], [name]Ceres[/name], [name]Callisto[/name], and [name]Thalassa[/name] would be runners-up (more or less in that order). I know you are looking to eliminate names, but [name]Artemis[/name] and [name]Apolline[/name] seem like such natural additions to this list…would you consider them? Edmee and Sunniva come to mind as well, though I think Sunniva is perceived as a bit trendy/passe in Norway.
[name]Callisto[/name]- like it. Pretty enough on its own to overcome the bear thing.
[name]Ceres[/name] ([name]Demeter[/name]?)- [name]Ceres[/name] I like! I went to high school with one who pronounced her name like [name]Carys[/name] (I think her parents were classicists)- slightly ambiguous pronunciation would be my only very minor concern. [name]Demeter[/name] is all right, but I think I’d avoid it because of the nickname [name]Demi[/name] ([name]Demi[/name]/[name]Demi[/name]-[name]Leigh[/name] being not quite what you’re going for in a name, I don’t think?)
[name]Circe[/name]- Turning men into pigs (or other animals) isn’t the kindest thing in the world-- and as much as I think there is something to be said for reclaiming powerful female characters who have been witchified over the years, I don’t think I’d want to be the one doing it every day with my given name.
Endellion- This is gorgeous, but a very unusual with one reasonably well-known bearer- the Camerons’ youngest daughter, [name]Florence[/name] Endellion. If I met one born now (or while [name]Cameron[/name]'s the PM) I would probably assume that her parents were admirers of Mr [name]Cameron[/name].
Everild- [name]One[/name] of my very favourites on your list. Strong, feminine, unusual but not unheard-of, and free from strong associations.
Fiametta- pretty, but perhaps a little insubstantial compared to the others?
Ferelith- Up there with Everild as one of my favourites here 
Hedone- stick with [name]Joy[/name]; what if she’s a stoic little thing?
Hesione- my only point of reference is the Trojan princess; not a story I think I’d want for myself?
[name]Indigo[/name]- Eh. Neither as pretty or substantial as some of the others. Bit old-school hippy?
[name]Lorca[/name] or [name]Lorelei[/name]- neither is as interesting as many of the others on your list. [name]Lorca[/name] is the daughter of [name]Leonard[/name] [name]Cohen[/name], and the mother of [name]Rufus[/name] [name]Wainwright[/name]'s child (baby is [name]Viva[/name]). I think [name]Lorca[/name] [name]Cohen[/name] was named for [name]Federico[/name] [name]Garcia[/name] [name]Lorca[/name]? I’m not sure what to think of it- much too cool for me, but could work for artsy Londoners
Edited to add that I was surprised to see Lorca included in the nb db! And mentions Cohen too…I forget that he’s one of those Canadian artsy types who’s well-known outside Canada too…oops.
Lùthien or Ludivine- both are pretty in English. I like that Luthien is a more subtle Tolkein name, but you’d probably have to explain it a lot, and the pronunciation could prove difficult in other languages (also, is the accent grave or acute? Would you include the accent on her name if you were to use it?). I think Ludivine is sort of an 80s name in [name]France[/name], if that is of any concern.
[name]Pomona[/name]- I like this one. Friendly and approachable, but still quite regal. I think of orchards rather than forests, but close enough!
[name]Sequoia[/name]- this is the name of a HUGE 4x4/SUV by Toyota in [name]North[/name] [name]America[/name]. The name is thus a little less natural and a little more like other nature/truck/SUV names in [name]North[/name] [name]America[/name]- [name]Sierra[/name], [name]Dakota[/name], [name]Aspen[/name], [name]Cheyenne[/name]- it probably doesn’t matter if she spends her years in Europe, but here the name has a very different set of associations.
[name]Tempest[/name]- middle? I would hate to have this name if I had a tempestuous nature. Which most (pre)teens do, which is also the time at which they are most sensitive about names…not sure. I know it’s been done; I also know that I wouldn’t have appreciated this name myself from the ages of oh, eight to eighteen? Twenty?
[name]Thalassa[/name]- this one works a little better than some of the other Greek deities. Definitely think more of the sea than starry skies and forests, but that’s not a bad thing!
[name]Vesper[/name]- in with Everild and Ferelith as one of my favourite three of your names. Definitely, definitely calls to mind a starry sky above a lush forest.
Viatrix- I like the history behind it. Two things would bother me, I think- it would be forever heard as [name]Beatrix[/name], and looks a little like a pharmaceutical name. They like their Vs and Xs in that trade (or a least the marketing departments do)-- I know the history of Viatrix and I still see it that way, sadly!
[name]Hippolyte[/name], Dracaena, [name]Eurydice[/name], [name]Melusine[/name], Melpomene, Proserpine, Saturnina do seem like too much in the first name spot for various reasons, but I think anything goes in the middle name spot.
Moriko, Niniane, and [name]Ourania[/name] I like and I think would work as first names, but I don’t have anything else to add (other than wondering how Moriko is perceived in Japan).