User blog comment:Ghmorello/Chapter 9/11: A Wano Girl That We'll Never Forget/@comment-83.84.172.109-20180712164714/@comment-24850639-20180713180123

I was curious about that too. Knowing Oda it could have been that the Kibi-Dango was just so freakin good that the Baboon now loves her forever, but we also know Oda has taken from the Legend of Momotaro before. Specifically with the codenames for Admirals (Aokiji, Kizaru, Akainu), and that Momotaro recruited these guys specifically by offering Kibi-Dango. Only animal Tama is missing is the pheasant, which it can technically be argued is represented by her master the Tengu guy.

To be honest though, the whole Kunnoichi thing makes sense to me too. When Kin'emon and Momonosuke were clearly hungry at the end of Punk Hazard, they made that whole big deal about their honor and "samurai don't get hungry" or something to that effect. Seeing as she's from the same region and desires to be a powerful warrior someday, I'm not surprised that she would punish herself so rigorously.