who took harrison at the end of dexter

In the end of Dexter: New Blood , Harrison takes off on his own after Dexter is shot and dies in the snow. In Dexter: Resurrection , Harrison is back in Dexter’s orbit and helps him, but the key ending beat is that Harrison leaves the mansion and gets his own “happy ending” rather than being taken by someone else.

If you meant the ending of New Blood specifically, Harrison wasn’t “taken” by another person so much as he walks away from the scene after Dexter’s death.