Derrick was one of the senior food reviewers from Rodu Culinary Review Magazine, recognized as the top reviewer for vegetarian food. As a vegetarian, Derrick focused on vegetarian food reviews, and thus he was the favorite critic of the vegetarians. He was the expert in this field.
He had specially come to Chaos City from Rodu under the invitation of Robert. He was going to do a complete review and rankings on vegetarian classification for the completely revised Delicious Cuisine Rankings.
Derrick had lived in Chaos City for a period of time when he was little. He was a good friend of Old Lorry. One could say that he became a food critic due to Old Lorry's influence when he was a young boy.
He was also involved for a period of time when Old Lorry was doing the Delicious Cuisine Rankings back then, so he did have some feelings for it.
Thus, because of this, he agreed on the spot when Robert went to him.
