The cook himself is likely to be an interesting character. He has to deal with the rowdy mercenaries and still manage to create delicious meals. There might also be the captain of the mercenary corps. His leadership and interaction with the cook could be fascinating.
Well, in 'cook of the mercenary corps light novel', the themes might include the value of non - combat roles. The cook, although not directly involved in fighting, is an essential part of the corps. It may also touch on the theme of adaptation. The cook has to adapt to the various locations and supplies of the mercenary corps' travels. And perhaps the theme of cultural exchange, as the cook might prepare different kinds of food from different regions for the diverse group of mercenaries.
I don't know of any mercenary novels where the protagonist is nicknamed Chef. But generally speaking, the protagonist of a novel usually had a nickname or name. The nickname or name was often set to highlight the protagonist's special personality or characteristics. If you can provide more specific information or the background of the story, I can provide you with a more detailed answer.
Ami is an interesting character as well. She seems perfect on the surface, being beautiful and popular. But as the story progresses, we learn that she has her own insecurities and a more complex personality. She often plays a role in the relationship dynamics between Taiga and Ryuuji, adding an extra layer of intrigue to the story.
Ainz Ooal Gown is surely one of the most interesting. His transformation from a normal player in a game to a powerful being in a new world is fascinating. He has to deal with his newfound power and the responsibilities that come with it.
One of the most interesting characters is Furuichi Takayuki. He provides a lot of the comedic relief in the story. His reactions to the strange situations are hilarious. Also, Baby Beel is very interesting. His cute yet powerful presence adds a unique element to the story.
Bell Cranel is quite interesting. He's the main character with his growth from a weak novice to a more capable adventurer. His naivete and determination make him stand out. Then there's Ais Wallenstein. She's a strong and mysterious swordswoman that Bell admires. Her combat skills and cool demeanor are appealing.
Kido is quite interesting. She has a strong leadership quality and a mysterious past. Her ability to keep the group together is remarkable.
Sebas Tian is an interesting character. He is a butler with a strong sense of justice. He often has to balance his loyalty to Ainz with his own moral code. For example, when dealing with the situation in the slums, he shows his kind heart while still being a servant of Ainz. Demiurge is also a great character. His intelligence and his elaborate plans to further Ainz's goals are always captivating to read about.
Makoto Naegi is quite interesting. His unwavering hope in the face of despair makes him stand out. Junko Enoshima is also very fascinating. She is the main source of chaos and despair in the story, with her complex and twisted personality.
Ageha Yoshina is quite interesting. His journey from an ordinary boy to someone deeply involved in the Psyren world is captivating. He has to adapt quickly to the new and dangerous environment.