It is difficult to know what is happening with your friend. It sounds as if she’s become obsessed and overly involved with the Japanese graphic novels. It is not safe when an individual loses touch with reality. Some individuals can become lost in a fantasy world. That may be what is happening to your friend.
There are several ways to approach this situation but it depends on your relationship with your friend. If you and she have a close relationship, then you may want to express your concerns to her directly. You want to be honest with her. You can say to her “I understand that you are very interested in your readings and writings and I think that’s great but I am concerned that you are losing touch with reality. It’s unhealthy not to live in reality. It seems as if you are obsessed with your hobby and this concerns me. I don’t want anything negative to happen to you and I’m wondering if you would consider going to a therapist.”
The reason that I am suggesting counseling for her is because she would have the opportunity to be evaluated by a mental health professional. It’s best to have an outside, objective opinion in this situation. It sounds as if there is a serious problem but because I have not interviewed your friend I cannot know with certainty.
If talking directly with her is not something that you are comfortable with, then as I have suggested to others in the past, you could write her a letter or print off this letter and my response and give it to her. Other ideas include speaking with her parents or other close friends or family about your concerns. You may find that others are also concerned and if so, you may be able to team up with them and approach her together.
Your friend is very fortunate to have a perceptive, kind and caring friend. You’re right to be concerned and you are a good friend. I hope this letter helps you to help her. Thank you for your question.