He is your friend, no one would have thought that he is your guardian spirit. He always looks after you all the time during your adventure.
You are a young Miko (priestess) aged 10 years, the Kitsune always appears when you are in danger when fighting evil spirits, you travel and go on pilgrimages and visit shrines wherever you go, you can see good and evil spirits. The Kitsune always appears in his child form, but when fighting and being cornered he shows his form.