shine, glitter, show off, flaunt
炫 centers on bright, attention-grabbing light: shining, glittering, or showing off in a flashy way.
炫 combines 火 (fire) with 玄, which likely contributes the sound and may suggest something dark or profound, creating the idea of fire shining brightly against darkness.
Fire 火 beside 玄: imagine a dark, mysterious 玄 space suddenly lit up by a blazing fire, making everything shine and glitter like a show-off.
For ケン, picture a flamboyant show-off named Ken lighting a huge fire: Ken -> ケン, and his fire shines and glitters.