First off, congratulations, you have a lovely daughter, who managed to look only slightly peeved off at you for making her sit for pictures! Anyway, I notice that these were made with a softbox attachment, but that the light is functioning very much like a "hard" light, or one that throws sharp-edged, deep, black shadows. Looking at the pictures, and the small catchlights in her eyes, and the sharp shadows, I was thinking that these had been made using an incandescent household lamp as the main lighting source, especially since the color balance looks a little bit warm, like incandescent bulbs often do. Overall, this type and style of lighting effect is typically a little bit more "masculine" than it is feminine, and the light from the softbox attachment, at the distance it was from the light to her face, creates deep under-chin shaows and strong shadowing under the nose that looks more like overhead room lighting than what we'd typically expect when somebody mentions the word "softbox".
I think you might like the look of bounced flash, fired off of a wall or ceiling, using a small bounce "scoop", like a white, plastic spoon rubber-banded to the flash and overhanging the lip of the flash about 1.5 inches, more so than this small softbox attachment, because this softbox attachment, at its current distance from her, is really too physically small of a light source to be making anything "soft"; the light source's size is what really helps to soften the light, and I think these types of shots of a young girl would usually look better with a bigger, softer, source of light.