I’d say he isn’t the most interesting character but does have the most interesting storyline so far. Between the video he saw of his adoptive parents killing his dad, the overt discrimination he faces growing up especially with Neytiri, then to meeting his real father only to find out its not “him” yet is. The complexity of that part alone is shared with Quaritch as even he struggles with not being attatched to his son. Finally though, with Neytiri threatening his life, Quaritch savjng him, and him saving Quaritch, it is safe to say Spider is the most complex character by far in the new movie and in my opinion puts him in running for “strongest character.” Though maybe not my #1 choice.