J wants him to throw away his humanity to climb to the top with him, is this because he's lonely? Maybe hes bored, perhaps he doesn't truly believe makoto has such strength to do ao and is just toying with him. THIS is why I love the idea of words and deceiving people having power because it can even fool the reader!! Nobody truly knows how J feels about ANYTHING because maybe not even J knows what he even wants at this point. Ive seen a lotta theories in the fandom that J wants someone stronger than him so he can finally let his gaurd down and "die". However nobody knows because hes such a deceptive demon gosh I love this story