2D FreeForm Direction Strafe relative to Character Forward

Hello.

I'm using a 2D FreeForm blendtree for character strafe movement. I know I'm missing something dirt simple, but I can't for the life of me figure out how to correct the strafe 'direction' so it's relative to the characters current forward.

This small function takes a target world position and the character's strafe movement should be relative to his facing that position.

 private void MoveToWithStrafe(Vector3 _TargetMovePosition)
     {
         //Get the direction to the target position
         Vector3 Direction = (_TargetMovePosition - Character.Transform.Position);
 
         //  I now have a direction, but it's not taking into account the character's 'Forward'
         // this can lead to the character strafing the wrong direction. 
 
         if (Direction.magnitude < 0.1f)
             Direction = Vector3.zero;
 
         Animator.SetFloat(ANIM_STRAFE_X, Direction.x);
         Animator.SetFloat(ANIM_STRAFE_Z, Direction.z);
     }

Can someone please remind me of the best way to get a direction relative to a character's Forward.

thanks