@Jack:
The significance of "Blue" was certainly mentioned in quite a few places (as were tool and master). By this point it would have been odd not to deduct it is at least a codename/identificator for her.
[quote=Dark Jack] "'Blue: the color most commonly associated with that of a clear sky or the ocean. It is often used as a symbol for melancholy or cold and of infinity and distance, but is also often associated with positive traits such as sympathy, harmony, faithfulness, friendship and confidence. It is also frequently interpreted to represent excellence and superiority.'" [...] Blue, like her clothes, the woolen coat hanging from her lithe and athletic form, the tunic underneath it, the trousers that hugged the shape of her slender legs.[/quote] 

And I see... Pity, it seems my idea would hardly work in that case, unless I ported a whole sect of pseudo-Buddhists or something, and even then it would not exactly follow the path I'd have intended.