What did the Duke eat today.

The name of the comic "The Foodie Princess and the Overbearing Duke" comes from What the Duke Eats Today. Foodie generally refers to a person who is particularly good at eating and loves to eat. It is also used in ACGN subculture.

Foodie characters are already very common in anime.

The semantic color here is neutral, but more positive.

Mostly refers to people who like to eat all kinds of food and food lovers. Of course, there are also people who like to eat everything.