  Magnetars are highly magnetized neutron stars. For a slowly rotating
magnetar, the strong magnetic field deforms the star, making it axisymmetric
with respect to the magnetic axis (the body symmetry axis). In magnetars, the
rotation axis is tilted to the magnetic axis, and we have an oblique rotator.
General relativistic treatment of the obliquely rotating magnetar gives rise to
frame-dragging velocities both in the azimuthal and polar direction. Solving
the Einstein equation up to first-order perturbation in rotation and
second-order perturbation in the magnetic field, we calculate the geodesic of a
particle near the star's surface. The polar frame-dragging velocity makes the
particle orbit non-planar, and the particle moves both along the azimuthal and
polar direction for a fixed radial distance. The extent of particle deviation
from planar orbit depends on the magnetic field strength and the misalignment
angle. We find that the continuous gravitational wave emitted from such
obliquely rotating axisymmetric star is non zero, and for small misalignment
angle, the gravitational wave amplitude depends more on the azimuthal
frame-dragging velocity. In contrast, for a large misalignment angle, the polar
frame-dragging velocity dominates. The energy loss from such a misaligned
rotator depends more significantly on the polar frame-dragging velocity and
therefore, can significantly affect the magnetosphere around a magnetar.
