of course you can use a regular body for the Daftoys set, but don't use one of these super cheap ones. The joints will become loose very quick. Also look for one that has this rubber chest part, so the shirt doesn't look weird with a shiny plastic one :-D Be aware you will need a slightly shorter body, as Alita is not really the same size as for instance Pepper Potts. (the endgame Black Widow has almost the right size) Oh and if you use the HT head sculpt you will need to modify the neck on the body and remove the peck from it, as the HT hs has it's own neck peck which is not removable from the head
Cheers