@Kiu_Orchid (Inspired by Turning Red, Fox and the Hound, & Dumbo chatting with Timothy the mouse)
My other idea hit me, in one of the journey, Alya gets her Kitsune ears and nine tails during night hour after not feeling well, in the morning she thought that someone made her a fur blanket, or if it was one of Wukong's little pranks till she felt her human ears were gone, yanked her fox ears, felt fur on her cheek then barked.
She began to panic till Tripitaka calmed her down, during the walk, she felt very unhappy about her new appearance till Wukong tried cheering her up till Pigsy said "Masters right Alya, its nobodies fault you got fox ears and tails, even if it makes you feel freakish or
Masters right Alya, its nobodies fault you became a nine tailed kitsune, your still you, even if your inner fox will one day make you do sinful things"
She wraps herself in her tail till Wukong was about to smack or pinch Pigsy but had to cheer up Alya by saying her fox ears and tail made her look cute or beautiful. She didn't want to believe till Wukong let himself inside Alya's tail and ask Tripitaka a minute with Alya, after that private time, he got through to her, with all the kind words it made her tails wag with joy, and he even said her tails wag in a cutest way when she said "Oh stop that Wukong your gonna make me blush. He then tells Alya she could be related to a great warrior Kitsune but they would have to figure out on that later till they find another village. Wukong would try to do everything in his power to help Alya hide her ears and tails but when she said "Although its gonna be very hard to tuck in my claws in" That is until poof, she was human again, after she figured out Claws out, her fox ears and tail pop out, claws in makes her human again.