Immortality of soul as well transmigration of soul is truth and both are relevant subjects to spirit; manifestation of soul is process beyond the reach of normal man.
Indeed soul keeps its different identity even on the plane of emancipation, here soul attain the state of bliss at the will of supreme but unified with their own state remains beyond words but both in spirit of immortality.
After the bliss of unison soul separates out for varying reasons to attain a respective body and maintain its separate identity.
Separate identity of soul cease to exist only with unalloyed pure love for god that makes it merge completely by losing its own identity in the identity of God.
May lord bless all.
Thanks please