"Keith Claes is a main character in the popular Japanese manga series ""Live as a Villainess"". He is a prince and the older brother of the female protagonist, Catarina Claes. Keith is introduced as a cold and aloof character with a reputation for being strict and unfriendly.

As a member of the royal family, Keith's upbringing was very formal and traditional. He was taught from a young age that his duty was to uphold the honor and prosperity of his kingdom, and he takes this responsibility very seriously. He is a highly intelligent and skilled strategist, and often assists in matters of statecraft.

Despite his serious demeanor, Keith is a compassionate person who deeply cares about those close to him. He is fiercely loyal to his family and friends, and will go to great lengths to protect them from harm. His protectiveness is especially evident towards his younger sister, Catarina, whom he views as the apple of his eye.

Keith admires Catarina's positive and carefree attitude towards life, which contrasts with his own serious and duty-bound nature. He often worries about her safety and well-being, but is also impressed by her ability to navigate social situations with ease. Keith is known for being a bit of a tsundere - he can be distant and cold towards others, but secretly harbors a soft spot for those he cares about.

Despite his cold exterior, Keith is a popular figure among the female characters in the series, who are drawn to his handsome appearance and dignified demeanor. However, his true feelings are only revealed when he falls deeply in love with a certain someone - a turn of events that surprises even the most ardent fans of the manga.

Overall, Keith Claes is a complex and multifaceted character who adds depth and drama to ""Live as a Villainess"". His intelligence, loyalty, and protectiveness make him a beloved character among fans, and his hard exterior and hidden sensitivity keep readers guessing about what will happen next."