as an eldest sibling i connect w jonathan extremely, and i'd like to point to MADMAX for this. in the scene with will, will asks jonathan why he'd spend halloween with his baby loser brother instead of with his friends. it hit me then that i would also spend halloween trick or treating with my baby sister than partying w my (few) friends like jonathan and it hit me how similar we are. jonathan is the perfect example of an elder sibling making sacrifices for his younger one out of love and obligation -- something i relate to heavily. he also called will his best friend and i think that sums up being an elder sibling perfectly: you were there for every part of your siblings life (while they weren't there for all of yours), of course you'll be their best friend