[quote=@Burning Kitty]
<Snipped quote by RumikoOhara>Government agent, they get paid to fight super villains and are told who to fight. Capes are unsanctioned vigilantes.

<Snipped quote>Again human naive morality hindering humanity. Some people do not deserve to live.


[/quote]

Sure she gets paid but Jenny also does it because she enjoys the challenge and is likely the nicest alien ever.
She's the type to see someone broke down on the side of the road and either fixing or at least towing them to repair.

Jenny isn't human and she killed sixteen men as the first act in her memory and was responsible for the injury of over 100 people
In short they are trying to keep her from becoming a Supervillian