Piper and Silena are two of the three most beautiful girls at camp half blood and the most beautiful daughters of Aphrodite, in this universe Silena is alive and they meet, you see them discussing their boyfriends and that Silena has encouraged Piper to actually dress like a daughter of Aphrodite and stand out with her beauty instead of trying to blend in Silena: you look beautiful Piper: oh, th-thank you