The main striker unit of the Fuso Imperial Navy. This striker is favored by many witches because it is easy to handle even for witches with weak magic capabilities. Because it puts less strain on the body, it has a long sustained operating time, but due to a large portion of the user's magic power being diverted to flying power, its defensive capabilities are low. This weakness became increasingly apparent in European battles where having a decent operating range was not necessary. It is extremely maneuverable. When used by veterans, the unit would demonstrate extreme agility and achieve great results, but the lack of defensive power was fatal to new recruits. Working on a proper successor to this unit became all the more urgent as a result.
The 12-Shi Fighter Legs prototype introduced in European fronts such as the Suomus defense achieved satisfactory results, and it was officially adopted as the Model 11. The main armament was the Type 99 Model 1 20 mm machine gun, but it was gradually revised with newer equipment. The carrier-based Model 21 was the first truly mass-produced variant and was the main equipment against Neuroi at the beginning of hostilities. Based on track records of its utilization in Europe, the Model 32 was developed with reduced range and increased attack power, defense power, and mobility, and was followed by the carrier-based Model 22.
Nevertheless, the Neuroi gradually became stronger, and as foreign countries introduced new units that demonstrated levels of 2000Mp to the front lines, this unit became outdated. Even in the Fuso Imperial Navy, it was being replaced by the new Shiden. However, the Zero was easy to operate, so it remained in service in rear reserve units for liaison and for training purposes. Therefore, the Type Zero Practice Fighter Legs Model 11 was created. It was based on the Type Zero Carrier Fighter Legs Model 21, which was one of the earliest Type 0 and was equipped with an old type of magic engine. Its folding mechanism was removed and part of the structure was simplified. Numerous units were newly built, but many units were Model 21s that were remodelled, and some training corps even used Model 21s as is. These airframes were mainly used in Fuso, but they were also attracting attention from other countries as training units, and some of the exported units were even used as actual combat units rather than training units.
Even if it became outdated, other models had trouble following the Zero during dogfights due to its superior maneuverability, and many frontline units requested the Zero to be enhanced. As a result, some updated models were produced, with better armor at the expanse of a shorter range for Europe. Examples include the Model 52 without the folding mechanism, the Model 53 with the more powerful Sakae 31 magic engine, and the Model 54 with the Kinsei 62 engine capable of 1350 Mp. The Model 22 Training Fighter Legs, which was based on the Model 52, was also built for training closer to actual combat.
However, these models with thicker armor lacked the original model's maneuvrability. The Model 54 with Kinsei engine was said to get its maneuvrability back, but even if it was slightly strengthened, it still had the structural weakness associated with the light weight design of the Type Zero. Therefore, a speed limit to not exceed during a steep dive was established due to the insufficient strength of the unit. This limit made the units incompatible with the main "hit and run" tactics used in Europe, and the Type Zero was once again removed from the front lines.
Due to supply shortages in Europe, some local frontline modifications were made to fit Zero with Liberian R-1830 engine. However, even with this heavier engine it did not differ much in terms of power and was not any better than the original model.
- 12 Shi: Prototype with Zuisei 13 engine and 2-blade magic propeller on the first airframe, later replaced with Sakae 12 engine and 3-blade propeller. 40 built, sent to Europe before the official adoption of the Type Zero.
- Model 11
- Model 21: First truly mass-produced variant, it introduced the folding mechanism.
- Model 32: Built for Europe with reduced range but increased attack power, defense power, and mobility.
- Model 22: Improved carrier version of the Model 32.
- Model 22 Kou: Armor added.
- Model 52: Folding mechanism removed.
- Model 53: Sakae 31 magic engine.
- Model 54: Kinsei 62 magic engine.
- Model 11 training type: Used later in the war for training when the Type Zero became obsolete. Numerous were newly built, but many units where converted from old Model 21s.
- Model 21 training type
- Model 22 training type: Based on the Model 52 and closer to actual combat units specifications.
- This striker unit is based on the Mitsubishi A6M Zero fighter.
- The magic engine are respectively based on the Nakajima Sakae and Mitsubishi Kinsei Mitsubishi Kinsei 14-cylender twin-row supercharged radial engines.