I purposely go back and rewatch the first episode after I finish a show just to see how different it was and how different they all looked!! I love being nostalgic and melancholy
It also let us see that Luke really wanted Percy on his side (and later Annabeth). He’s doing this for them too and he thinks it’s right. He was basically pleading with Percy to join him. It was so much more emotional and such a good decision!!
YES and they actually have full conversations that the characters have said to each other, they don’t just start a new conversation every time they send a message!