Chase is a member of Acadia. She was once a courser, working for the Institute, until she met DiMA and was convinced of his mission. She cut all ties with the Institute and is now helping the escaped synths travel safely to Acadia.
Chase is the only female courser encountered in the game.
Given that a courser chip is an integral part of every courser that not only cannot be removed without killing them, but also allows the Institute to pinpoint the courser's location in order to relay them back underground, it is unclear why the Institute's Synth Retention division has not been able to pinpoint her yet.
Unlike many other synths, Chase's name is not a 4-digit alphanumeric code. This is likely symbolic of Acadia's status as a safe haven for synths who wish to start a new life, similar to the Railroad in the Commonwealth.
Chase is the only courser known to have deserted the Institute.