I really feel that Percy, seeing Damian, has found closure to his trauma with Luke since I feel that both Luke and Jason will be the deaths that Percy will never get over. I always hoped that some book would end with Percy going to look for a new demigod and That upon finding him and seeing that he said that Hermes is his father, Percy will notice that he was the reincarnation of Luke and thus having closure to his story but Rick never did, at least here Percy can remember his old friend and find the closure that he had. never had with luke. Wow, I'm writing it as if it were a romance and Luke and Percy were a couple, sorry, I'm not ship them but that's just how my words came out.❤😂 postscript. I love that they wrote murderer of brother why did those from Hermes' cabin see Percy and I think that Hermes still has a certain grudge against Percy for having killed his son even though he knew that there was no other option and that Luke killed himself😢😂❤