I’m happy for you that you made a decision for a first name! I wouldn’t do [name_f]Aria[/name_f] as it doesn’t have a long history of use and would be kind of out of place on a contemporary adult, but the other options are fine. My personal favorites are [name_f]Lucy[/name_f] [name_f]Isabel[/name_f], [name_f]Lucy[/name_f] [name_f]Elena[/name_f] and [name_f]Lucy[/name_f] [name_u]Seren[/name_u].
My favourites are [name_f]Lucy[/name_f] [name_f]Catherine[/name_f] and [name_f]Lucy[/name_f] [name_f]Eleanor[/name_f]. [name_f]Lucy[/name_f] [name_f]Catherine[/name_f] is beautiful and timeless, but a bit expected since [name_f]Catherine[/name_f] is a common middle name. [name_f]Lucy[/name_f] [name_f]Eleanor[/name_f] is equally lovely, doesn’t quite flow as well to me but more unique and memorable.
Since [name_f]Lucy[/name_f] is a short name, it looks a bit abrupt or incomplete with another short name like [name_f]Aria[/name_f], [name_f]Faye[/name_f] or [name_f]Rose[/name_f], especially if the middle is one syllable too. Names with a strong “s” sound like [name_f]Elise[/name_f] or [name_f]Estelle[/name_f] sound a bit hissy with [name_f]Lucy[/name_f] to me.
Good luck deciding! You’ve got some lovely options here. The first name is the most important part, so glad you’ve found something you’re happy with.