The Snack Children
The Snack Children - or 'Snacklets' are 2 kids, their father is Mr. Snack, and their mother is Ms. Snack.
The bicolor cat, Mr. Inspector, is more prominent in the images, and is likely braver. The tabby, Little Fella stays near the entrance in images, and does not enter the chamber as quickly. The tabby appears to be more timid, while bicolor is more brave, and enters the feeder chamber.
They won as the 3rd Most Favorite Cat in the Hello Street Cat (EN) 3rd Weekly Fan Poll
Appearance
The Snack children (AKA: Snacklets) are 2 domestic shorthairs. One of them (the more notable one in the pictures) is a bicolor ginger broken mackerel tabby and white cat, the other one appears to be a ginger tabby.