A dark twist of a child could be a whirlwind of a child, that is, a very active child with dark hair and complexion. A twist is also a braid, so perhaps it’s a dark girl who is all braids! Another possible option is a dark child twisting or writhing. However, if the child was hiding, it would hardly do that.
What about the use of “twist” to possibly describe the posture of a child hiding behind someone? I mean, when a child hides behind an adult, most of the child’s body might be directly behind the adult, but often the head, neck and shoulders would be “twisted” to the side in order to still be able to see what’s going on. I can imagine this as a possibility, too.
Absolutely, and it’s so childlike, too! Have you seen an adult trying to imitate a child? All this hand-wringing, shoulder-shrugging, face-pulling, jumping around, etc.! I once read somewhere that it takes an athlete to imitate a young child’s movements for a whole day (it doesn’t even have to be a hyperactive one). How’s that for exercise ?