Velocity channel maps of MUSE [N II] λ6583 (color) and ALMA CO(J = 1−0) (magenta contours). The white dashed circle indicates the characteristic shell-like structure of the WIG, with a radius of approximately 5.5 kpc. Panels are ordered by velocity from 1174 to 2400 km s⁻¹. Partial spatial overlap is observed between the CO and [N II]-bright regions. The [N II] kinematics reveal a shell structure originating in the east at low velocities, bifurcating into northern and southern components at intermediate velocities, and converging in the west at high velocities. The northern shell is prominent, while the southern part is more diffuse. Labeled WIG structures include “Λ-Str” (southern Λ-shaped structure), “NW-LSs” (linear structures perpendicular to the northwest jet), “Fishhook” (hook-shaped feature near the jet), and “Ctr-LSs” (linear structures extending northwest/southeast from the center).