Let me explain as nicely as possible.
Fawny thought of Alexis before she joined dA.
When she joined dA, she didn't know Emily was British. All the pictures she (Fawny) saw of Emily didn't say she was British.
She made Alexis blonde because she (Fawny) wanted to be blonde.
Fawny herself says this here:
[link](oh, and Femily is dead. Its thomarie now.)