Mothra's agent is a japanese bureacrat, who keeps trying (and failing) to convince a procrastinating Mothra to come into work and save the city from Godzilla.
A distant drilling sound kept interrupting the recording of Episode 9 at the Inspire Theater. After several incidents Jacob began playing a Godzilla drop, prompting Paul to create Mothra's Agent, who keeps calling Mothra to remind him that he is behind schedule on his Godzilla related duties.
In Episode 69 we learn he no longer represents Mothra after he ate holes in his coat, he now represents Mecha Godzilla.
Mothra's Manager returns briefly after being mentioned in a Scoop Mail in Episode 77.
"Say hi to your wife-ra for me."
"You were supposed to take care of this last week."