ANAPHASIC LIFE FORM
Description Humanoid, Bipedal - Shapeshifter
Size Medium
Skin Pigment Varies
Hair Varies
Distinguishing Features Varies
Series TNG: "Sub Rosa"
Planet of Origin Unknown
Quadrant Beta (presumed)
Background Appeared to Commander Beverly Crusher from the Enterprise-D in 2370.  The life form took the shape of a 34 year old human named "Ronin".  He required the company of a suitable Human female to maintain molecular cohesion.  Ronin claimed to be born in 1647 in Glasgow, Scotland.
Editors Notes The "Ronin" entity first found a suitable host; Jessel Howard, and gained a powerful hypnotic control over her, giving her emotional sustenance in return for the molecular cohesion he needed.  Ronin was passed down the Female Howard line upon the death of each 'host' until Felisa Howard in the 24th century.  Upon her death Ronin attempted to bond with Beverly Crusher - Felisa's grandaughter.  She was able to resist him and learn his true nature.  It is presumed that the Ronin entiy has been destroyed, although others may exist.
Startrek.com
Picture Gallery
Ronin entity

1