For me, when I talk about a twin flame runner, I am talking of a twin who finds it more difficult to see themselves so at first they can be very resistant. This is very real. Yes, one can argue that our soul's predetermined that we would be resistant for a while as we go through the stage of ego death, but I do feel there is an element of free will to just how long we resist looking into our true selves. It is within our free will if we choose to ignore our soul calling even when it has become glaringly obvious. It is within our free will to resist the flow in which our soul is wanting to take us and actively try and swim upstream. But also, it is not within our free will but is a part of divine timing when we will reach the true understanding of why it's okay and actually beneficial to face and walk toward sour truth. I feel there is both predetermination and free will and it's about finding the balance in order to truly understand that following our higher calling towards our true self and towards our twin flame is what will bring us peace.
A twin flame runner is usually afraid that you will reject their true self which is how they felt in their past with their parents. They are very afraid of being rejected for who they really, especially by their twin flame because they will take it as confirmation of their supposed unworthiness. That is why it is very important to be sensitive when it comes to our twin flames. The slightest little thing can be magnified and taken extremely personally which causes them to hide away in their shell again, behind their mask of protection.
What I try to help people with through my Twin Flame Psychic Readings is identifying the parts of themselves where they are blocked and finding it hard to accept themselves or may be unconsciously looking to their twin flame to fill in the voids, the areas in which they are not loving themselves. Also, in my readings, I identify exactly why the runner twin flame is running from looking into themselves and why they find it hard to accept themselves and spirituality in many cases.