girl's name that sounds a bit like...

[makescakeswhenstressed]

Annabel.

ie: it needs three syllables. Quite a middle class/upper class name. Someone you'd imagine to be slightly reserved but terribly polite.

and before I get jumped on this is for a character in a story!

[KateF]

The person who springs to my mind is a Francesca!

[CandiceMariePratt]

Genevieve

[MrsTerryPratchett]

Christabel, as in Pankhurst.

[darthsillius]

Arrabella
Leonora
Lucinda

[FriskyMare]

Rosalind

[LedaOfSparta]

Harriet
Victoria

[LedaOfSparta]

Victoria doesn't have 3 syllables though obvs

[YoniMontana]

Clarabel

[YoniMontana]

Persephone (but four syllables though).

[BuntyPenfold]

Eugenie

[Albert]

Fernanda

[Iusedtowearmakeup]

Isabel

[HystericalParoxysm]

Cressida

[BreathingLessons]

Is there a reason why you can't use Annabel as that's what you're picturing for your character? What about Juliet or Beatrice. I would put Annabel, Juliet and Beatrice in the same sort of category.

[BreathingLessons]

What kind of book is it?

[Justfornowitwilldo]

Josephine, Juliet.

[MoonHare]

Meredith
Abigail

[Moominsarehippos]

Nathalie
Emily

[Justfornowitwilldo]

How old is this person? Naming trends change.

[makescakeswhenstressed]

Breathing: can't use it because I've used it before.

A rude one

and she's about 25 I guess

[BigBongTheory]

Jilly, is that you?

[Thisisaeuphemism]

Miranda

[Iusedtowearmakeup]

Phillipa

[Iusedtowearmakeup]

Camilla

[Glimmerberry]

Mirabelle