HI anon 🙂 As you’ve noticed Kinshifts are when your personality and perception of yourself changes a little to match whatever kintype is active during the shift. You can read more about kinshifts and other types of shifts here. http://fromfiction.tumblr.com/post/147577047852/could-you-explain-kinshifts
is it fictionkin to identify to give a sense of identity to yourself and give a peace of mind?
It is not. That would be considered copinglink, which is a different, but just as valid type of alterhuman identity. People with copinglinks deliberately choose characters and take on their identity for mental support. You can read more about copinglinking here http://who-is-page.tumblr.com/post/139871297049/clinkers-and-copinglink
The difference between a copinglink and a kintype is a kintype is not deliberately chosen, and can not be discarded just because the kin doesn’t like it or it makes them uncomfortable. Being kin is a completely involuntary discovered part of your existence and identity. For many people it is a spiritual belief, often involving a past life or simultaneous existence, however there are kin who believe that the source of their kintype is psychological in nature.
Again, the difference between a psychological kintype and a copinglink is a copinglink is deliberately chosen, whereas a kintype forms on its own and won’t go away.