companion, follower
侶 centers on a person who accompanies another: a companion or follower who shares a journey or purpose.
侶 combines the person radical 亻 with 呂, which likely contributes the sound and may relate to the idea of a pair or sequence, suggesting a person who forms a pair or follows.
A person 亻 beside 呂, which looks like two connected rooms or a spine, suggests someone who stays close, like a companion following along.
For リョ, imagine a loyal companion named Ryo who follows you everywhere: Ryo -> リョ, and he is your faithful follower.