She is a kindergarten teacher at Seishou Academy under the elementary department. Her name "Thompson Sensei" was obviously derived from the M1928.

Type: Submachine gun

Place of origin: United States

Weight 10.8 lb (4.9 kg) empty (M1928A1)

10.6 lb (4.8 kg) empty (M1A1)

Length 33.5 in (850 mm) (M1928A1)

32 in (810 mm) (M1/M1A1)

Barrel length 10.5 in (270 mm)

12 in (300 mm) (with cutts compensator)

Cartridge .45 ACP (11.43 × 23 mm)

Action Blowback, Blish Lock

Rate of fire 600–1500+ rpm, depending upon model

Muzzle velocity 285 m/s (935 ft/s)

Effective range 50 metres (160 ft)

Feed system 20-round stick/box magazine

30-round stick/box magazine

50-round drum magazine

100-round drum magazine

(M1 and M1A1 models do not accept drum magazines)