fine growth of hair curly hair
鬈 centers on hair that grows in a fine, curly, or wavy manner. It describes the quality of hair being elegantly curled or having a delicate, soft growth.
鬈 combines 髟 (hair) with 卷, which likely contributes both sound and the idea of curling or rolling up, suggesting curly hair.
The top 髟 represents long hair, and the bottom 卷 looks like something rolled up. Picture fine hair that naturally curls into soft ringlets.
For ケン, imagine a ken doll with perfectly curled, fine hair: Ken -> ケン, and his hair is the ideal of curly growth.