The character Brutal is clearly meant to mimic former UFC fighter Chuck "The Iceman" Liddell. Not only did he have a short mohawk, but also had Asian tattoos on the side of his head. The actor previously worked as Liddell's double in the film Altitude.
While it may seem illogical, a person can be arrested for excessive force if they are a martial arts expert. While someone as young as the Maya character might not be arrested, the burden of intent is usually a case by case assessment. Currently, the only US state or territory where martial arts expertise must be registered as a "weapon" is Guam.
Gorkhas (or in some nomenclatures Gurkhas) are renowned for their tenacity and strength. Having trained in The Himalayas and being listed as an elite sect of the British and Nepalese military, they were a pivotal fighting force for the Allies during World War II. One such battle involved legendary soldier Lachhiman Gurung defeating 200 Japanese soldiers with 31 confirmed kills by the aforementioned soldier.