These are the tales of a certain couple who climbed a mountain... a college student who moved into a certain apartment building... and  a certain pair of siblings...
It's for self-defense. 
If they attack me, I can...
...هذا دفاع عن النّفس. إن هاجمني، يمكنني
Das ist zur Selbstverteidigung.
Es para defenderme.
Es para defenderme.
Isso é para defesa pessoal.