mane
鬣 centers on the long, coarse hair that grows along the neck of an animal: a mane.
鬣 combines 髟 (hair) with 巤, which likely contributes the sound and relates to the idea of bristling or standing hair, as in a mane.
The top 髟 means hair, and the bottom 巤 looks like a bristly, spiky shape. Imagine the long, rough hair of a lion's mane standing up along its neck.
For リョウ, picture a lion's mane flowing in the wind: the flowing mane cues リョウ (ryou), like the sound of a long, flowing mane.