???what is your question exactly
Answer:
Nothing.
Explanation:
It's a fictional character that has no consciousness. So what if people "like" the character? It's not like the character likes anyone back, or can suddenly become aware of your emotions.
The fact that you see your friend as a potential threat for holding a similar interest in the fictional character holds no basis for logic.
The truth is, if you for some reason are upset that someone you know likes the same fictional character you like, then you are being petty.
We need to see the whole picture in order to figure it out. Because we can't see the top of the page