I absolutely love this question and I want to give you the most honest answer I can! The answer is YES, and I say that with complete conviction! Let me share a bit about my own experience because I think it might encourage you.
I met my soulmate over thirty-five years ago, and at the time neither of us had any idea what was unfolding! The circumstances were entirely outside anything I had consciously planned or visualized! I was not sitting around listing traits from fictional characters or making vision boards! It just happened, and it happened beautifully!
Here is what I have come to understand through the years! The Law of Attraction works like gravity, it never stops operating! But here is the deeper truth that changed everything for me! Nothing exists outside of you! Everything you desire is already within you! You do not need to reach outward and pull something toward you because it is already present and waiting to be experienced!
This is not just philosophy, it is something I have lived and felt in my own marriage! My partner and I built a deeply fulfilling life together, and every single day I feel grateful that our paths crossed! We are the authors of our own stories, and soulmates are not fictional characters to be hunted down! They are real truths already in existence, waiting to be recognized with open eyes and an open heart!
So to answer your question about manifesting based on traits you admire in fictional characters, I say go for it! There is nothing wrong with knowing what resonates with you! Those qualities already exist within the universe and within you! Trust that the right person is already out there or already moving toward you! Enjoy the journey and never doubt that what you seek is already seeking you too!