Loki goes over to Thor, "Mind your tongue and leave my business to me you child." He speaks harshly but then rubs Thors blonde hair into his face playfully.
"No you don't." his eyes are bright green hypnotising the child.
(She doesn't have to be for him using magic on her sister he isnt that good yet he accidentally made her forget the last five seconds, he meant to make her not want to see the paintings..)
For according to the trollish philosopher Plateau, "if you wants to understan' an enemy, you gotta walk a mile in his shoes. Den, if he's still your enemy, at least you're a mile away and he's got no shoes." — A Blink of the Screen by Terry Pratchett