The AH-1S Kisarazu comes with a unique skin of the Kisarazu Sisters, which started from the original character draft created by a personnel of the 4th Anti-Tank Helicopter Unit of the Ground Self-Defense Forces Kisarazu Camp, located in Kisarazu, Chiba Prefecture in Japan. These special illustrations were brought to life by a professional illustrator Takashi Fujisawa, in order to commemorate the 20th anniversary of the 4th Anti-Tank Helicopter Unit.

It was introduced as a premium pack in Update 1.89 "Imperial Navy". It was removed from the store after the 8th Anniversary Sale, and reintroduced in Update "Hot Tracks" as a premium purchasable in-game for Golden Eagles. In addition, the AH-1S Kisarazu is the first vehicle in the game to feature a female flight crew. Both females have a unique model and are part of the 4th ATH and one of which is cosplaying as one of the sisters, Kisarazu Wakana (木更津 若菜).

The Cobra can use thermals with decent zoom, and 8 ATGM missiles, but it has a limited range that makes it vulnerable to its enemies. It is more like a flying ATGM carrier than an independent helicopter that can snipe from afar. The TOW missiles are powerful, but they can only reach 3.75 km, which is shorter than the range of the AA systems that the Cobra will encounter. The best way to play the AH-1 is to support the ground team and jet aircraft, and let them handle the SPAA/SAM, planes, and other helicopters.

* If the team fails to claim aerial supremacy, the helicopter crew should fly low and hide behind buildings or terrain, fire a missile at a target and then move away, and repeat this tactic.

* If the skies are clear, the helicopter crew can fly higher and see more of the battlefield, fire missiles at ground targets, and provide information to the team before returning to the helipad for more missiles.