  We present new, near-infrared ($1.1 - 2.4$ $\mu m$) high-contrast imaging of
the debris disk around HD 15115 with the Subaru Coronagraphic Extreme Adaptive
Optics system (SCExAO) coupled with the Coronagraphic High Angular Resolution
Imaging Spectrograph (CHARIS). SCExAO/CHARIS resolves the disk down to $\rho
\sim 0.2''$ ($\rm{r_{proj}} \sim 10$ $\rm{au}$), a factor of $\sim 3-5$ smaller
than previous recent studies. We derive a disk position angle of $\rm{PA}$
$\sim 279.4^\circ - 280.5^\circ$ and an inclination of $\rm{i}$ $\sim
85.3^\circ - 86.2^\circ$. While recent SPHERE/IRDIS imagery of the system could
suggest a significantly misaligned two ring disk geometry, CHARIS imagery does
not reveal conclusive evidence for this hypothesis. Moreover, optimizing models
of both one and two ring geometries using differential evolution, we find that
a single ring having a Hong-like scattering phase function matches the data
equally well within the CHARIS field of view ($\rho \lesssim 1''$). The disk's
asymmetry, well-evidenced at larger separations, is also recovered; the west
side of the disk appears on average around 0.4 magnitudes brighter across the
CHARIS bandpass between $0.25''$ and $1''$. Comparing STIS/50CCD optical
photometry ($2000-10500$ $\r{A}$) with CHARIS NIR photometry, we find a red
(STIS/50CCD$-$CHARIS broadband) color for both sides of the disk throughout the
$0.4'' - 1''$ region of overlap, in contrast to the blue color reported at
similar wavelengths for regions exterior to $\sim 2''$. Further, this color may
suggest a smaller minimum grain size than previously estimated at larger
separations. Finally, we provide constraints on planetary companions, and
discuss possible mechanisms for the observed inner disk flux asymmetry and
color.
