I hate when people mistake ninjas for samurais and vice versa, but that is common and even the japanese do it themself in their mangas.
Samurai: Is a warrior who follows the set of rules known as Bushidō, which includes sacrificing his own life for his master if needed.
Ninja: Is a covert agent or mercenary that does espionage, sabotage, infiltration, and
assassination. Ninjas didn't have really strict rules like the samurai,they did it all for money.
Obvisiously this hamster is not a ninja, unless killing robots counts as assasination or sabotage.
assassination for pay.