Complex sentence: However, Ciel has occasionally expresses concern for the well-being of the few close to him, and exhibit traits befitting a child for his age, such as his fondness for sweets and games.
Split into simpler sentences: However, Ciel has occasionally expresses concern for the well-being of the few close to him. Despite his stoic demeanor, Ciel exhibits traits befitting a child for his age, such as his fondness for sweets and games.