That's a clever lie for a scum to come up with, usually a yukkuri so far up its own ass would immediately call mister a shitty slave and demand sweets. Although it didn't work out how she planned in the end, I still am slightly impressed.
Scum Marisa:
"Mister Human! Know what Marisa did? She punished the bad yukkuris who entered Mister Human's home without permission! And Marisa? She wants to be friends with Mister Human! But bad yukkuris like these cause problems for Mister Human! So! Marisa's job is to punish them!
If Mister Human is taking it easy, then Marisa can take it easy too!! Take it easy, okay! Mister Human!"