distancer

noun

1. A person who tends to maintain emotional distance and detachment.

   “Coordinate term: pursuer”

   “Pursuers are more likely than distancers to seek help from a professional, such as a physician.”

2. A means for establishing physical or emotional distance.

   “The band’s third album, “When the World Comes Down,” isn’t striking obscure poses, inventing slang or playing with the audience through distancers like tension and distortion.”

3. (dated)A long-distance runner.

   “Phillips was one of a field of a dozen distancers who started in the twomile handicap run which featured the games of the Friend's of Irish Freedom at Ulmer Park, Brooklyn.”