Who is KJ in the novel, All This Could Be Different?

KJ is Amit's childhood best friend and Tig's sister. At the beginning of the novel, KJ is recovering from a drug addiction, and Sneha regularly speaks ill of her because she feels that KJ is abusing Amit's charity toward her by taking so much of his money. By the novel's conclusion, however, KJ has been integrated into Thom and Tig's communal home and is beginning to recover from her addiction.