The number of blades/points on a plant leaf has no relationship or indication to either sativa or indica genetics, nor does it reflect anything else such as potency, health or vigor, it is all controlled by genetics.
I have had both sativas and indicas with 13 fingered leaves.
Fat, broad and usually shorter blades are usually associated with indica genes and long thin blades are usually associated with sativa genes.
The picture you posted certainly shows a plant with strong indica genes, judged solely on leaf shape in my opinion, which is to be expected from Northern Lights.
Hope this helps, Organoman.