Looks like she is working for the same Musashi after all - and Musashi isn't happy with Muppo eating the customers' samples.

Also, it looks like Yano Toshinori noticed the extra character showing up...

@hosimaki: @KonamiPeppler 店長は戦艦級（承認済み） pic.twitter.com/Qqfvbx5iWA

1 sample per person Muppo. 1 sample per person.

Jarlath said:

Also, it looks like Yano Toshinori noticed the extra character showing up...

Not so much noticed as responded after giving permission, per the artist's comments. The comment in the response tweet is "The manager is a battleship-class. (Usage approved.)"

Muppo gets to work with the best managers.

Keo said:

1 sample per person Muppo. 1 sample per person.

That seems more than fair.

[ She's a hungry girl. ]

Worst case scenario: Muppo would've been fired.

WalkerP said:

Worst case scenario: Muppo would've been fired.

That's why I said she got the best managers.