What happens to Terra in Kingdom Hearts Birth by Sleep?

Answer 1

**SPOILER WARNING**

Terra is sent out to find Master Xehanort and the source of the Unverse under orders from Master Eraqus.

In the process, he is manipulated into doing terrible things by many people. This manipulated into killing Master Eraqus, and he leaves the Land of Departure unprotected for Master Xehanort to destroy.

He then confronts Master Xehanort and fights him in The Keyblade Graveyard. After Vanitas creates the x-blade, Master Xehanort stabs himself with the keyblade and forces his heart into Terra's body.

Master Xehanort manages to take over Terra's body, but Terra wont accept it. His armor rises from his will and soul, and attempts to reclaim his body. He manages to defeat Master Xehanort, but after the x-blade shattered, the body was lost in the confusion, and the armor-known as Lingering Sentiment- remained in the Keyblade Graveyard.

Afterwords, Aqua confronts 'Terranort' (Master Xehanort possessing Terra's body) in Radiant Garden, and she tries to reclaim his body. In the end of the fight, Terra tries to eject Master Xehanort from his body by stabbing himself with the keyblade. This opens a dark portal which Terranort begins to fall into. Aqua rescues him, but is lost in the darkness, and Terranort is left knocked out in Radiant Garden.

Braig then brings Ansem the Wise to see the knocked out man, and Ansem the Wise adopts the man as an apprentice.

Ever since then, he's been called Xehanort, and has been the main villain of the series up until now.

(Mind blowing, right?)

Answer 2

His mind and body get taken over by Xehanort.