For some background:
The story takes place in modern day. The sister will have an [name_f]Indian[/name_f] mother and a white father. Both are [name_u]Christian[/name_u], so a biblical name would work. She will be 12 with dark skin and hair, and a bright and accepting personality. I’m trying to avoid B, H, and Z names, or names that sound like [name_f]Zara[/name_f] (since that’s another main character). Names I’ve considered are [name_f]Monique[/name_f], [name_f]Tanvi[/name_f], [name_u]Devi[/name_u], and Summit. I’m leaning towards [name_f]Monique[/name_f]. However, I don’t know if it fits with [name_u]Baylor[/name_u] and [name_u]Harbor[/name_u].
Update: I made a decision!
The family:
Chandra Singh-Dunn
Leonard “Len” Singh-Dunn
Baylor Leonard Singh-Dunn
Harbor Jayne Singh-Dunn
And…
Monique Aishwarya Singh-Dunn! Thanks to everyone for their help 
I think [name_f]Monique[/name_f] works fine with [name_u]Baylor[/name_u] and [name_u]Harbor[/name_u], adding another name ending in -or would be overwhelming… it could work to feed worries about feeling different from her siblings since her name doesn’t “fit in” to the theme but I don’t know.
[name_u]Prairie[/name_u]
[name_f]Meadow[/name_f]
[name_u]Cove[/name_u]
[name_f]Fawn[/name_f]
[name_u]Dove[/name_u]
[name_f]Fern[/name_f]
[name_u]Juniper[/name_u]
[name_u]Sparrow[/name_u]
[name_f]Marigold[/name_f]
Sailor
[name_m]Kiefer[/name_m]
[name_u]Dove[/name_u]
[name_u]Waverly[/name_u]
[name_f]Meadow[/name_f]
[name_f]Maris[/name_f]
I think another gender neutral name would work really well here.
Some ideas:
Evian
[name_u]Sterling[/name_u]
[name_m]Ashbel[/name_m] (this is biblical, he was barely mentioned but was a son of [name_u]Benjamin[/name_u] - I think it would be really nice on a girl, too)
[name_u]Nova[/name_u]
[name_u]Hollis[/name_u]
[name_u]Abbott[/name_u]
[name_u]Arliss[/name_u]
[name_f]Danique[/name_f] (this isn’t necessarily gender neutral, but it reminds me of [name_f]Monique[/name_f] so maybe you’ll like it)
[name_u]Colby[/name_u]
[name_f]Avni[/name_f]
[name_m]Aven[/name_m]
[name_m]Cadell[/name_m]
[name_u]Amery[/name_u]
[name_u]Sage[/name_u]
[name_u]Clove[/name_u]
[name_f]Aster[/name_f]
[name_u]Adair[/name_u]
[name_m]Rush[/name_m] (again, not necessarily gender neutral, but I think this would be a really cool name for a boy)
What about [name_u]Baylor[/name_u], [name_u]Harbor[/name_u], and…
Elysande
[name_f]Integrity[/name_f]
[name_f]Merona[/name_f]
[name_f]Cimarron[/name_f]
[name_f]Taraja[/name_f]
[name_f]Olena[/name_f]
[name_f]Frances[/name_f]
[name_f]Thalassa[/name_f]
[name_f]Shulamit[/name_f]
[name_u]Janan[/name_u]
[name_f]Deva[/name_f]
[name_f]Wrenley[/name_f]
[name_f]Varda[/name_f]
[name_f]Kessie[/name_f]
[name_f]Gucci[/name_f]
[name_f]Zora[/name_f]
[name_f]Jasmine[/name_f]
[name_f]Queenie[/name_f]
[name_u]Nile[/name_u]
[name_u]Lake[/name_u]
[name_u]Rain[/name_u]
LMK what you think!!