Question: are arya and jon wargs?
Answer: Yes Arya is a warg and I think Ghost/Jon helped awaken her ability. During Clash, Jon has a wolf dream where he meets a weirwood (bran) that speaks to him. ... He is heard by Bran and Arya and both Starks are changed: Arya/Bran claim their warging/greenseer identity after Ghost's first howl.