Natural Beauty, Modest Dress

As for sweetheart, her image is associated with natural beauty. She may occasionally use make-up, but she is at her best when she's all natural and surrounded by her uniquely genuine pure innocence.
Sweetheart is not necessarily heavenly beautiful, but there is definitely something about her appearance, some particular part of it that makes up her special celestial charm: beautiful hair, alluringly thin figure, amazing smile, playful dimple, or her irresistible look in her eyes.
Actually, so many things can be said about a person's eyes and the look in general, that we decided to point out the difference basing on this very criterion regarding the appearance of our types of female extremes. Our sweetheart's eyes beam with her main traits of character – calm, kindness and gentleness, her look reflects it no matter how she may disguise her true self for this or that reason.
If, for instance, the two types of women – bitch and sweetheart try to switch places and i.e. fit their appearance to the personal image of each other's opposite type, it will be definitely possible to see their true selves through their eyes.
Now let's switch to a sweetheart's clothes. Typically, it's modest, modest from the point of view of her character, not the price of clothes. She may wear expensive dresses or cool jeans or great up-to-date fashionable clothes without being vulgar or showing her body parts to each and everyone. Her style can be different though classic is typically sweetheart's preference. In any case, the key word will always be 'modesty'.