Astrid and hiccup were different people Astrid the scrawny fish bone weak and many others, as for hiccup well he was the mightiest boy people knew son of Stoick the vast the Chief of Berk strong wise and many other things you could think of What will happen when Astrid gets taken from a night fury during a raid and hiccup sees what will he do, think or does he even care read to find out ( hiccstrid thoothless and the light fury rufflout etc.)