Question: why did tywin like arya?
Answer: all in all, tywin lannister was nice to arya because the show writers wanted him to be nice and arya to have plot armour . ... In the GOT (TV show) Arya is a cupbearer in disguise for Tywin Lannister. Petyr shows up and Arya tries to stay hidden, but there is a point where Petyr stares at her with narrow eyes.