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Trouble translating small part of a newly released game

Feb 27, 2016
I want to translate at least the first 30 minutes or an hour of a new game called "Crystar" and post it on YouTube in hopes that it'll get localized in English if people know about it, and to improve my Japanese skills.

The part I'm having trouble is at 4:42 to 4:49 in the video below. I marked the unknowns in red and provided a possible translation:

"You leave the entire hamburger untouched and only eat the potatoe.
Goodness... you have to eat everything, sis."
If some context is needed, the whole scene starts from 4:27 to 4:49.
I haven't been to this forum in two years, but I'm glad to see it's still active. I appreciate the help.