Headcannon: nymphs sometimes grow fond of certain ponies or changelings and can get ridiculously attached to them, to the point where if someone tries to take the nymph away from said person when the person doesn't want to have them be away (say, a changeling queen taking a nymph away because she wants them to be trained to be ruthless *cough*cryssy*cough*, they can get pretty aggressive to get back to the person. and when they mature...