Not much was also shown between Kenma and Shibayama. No surprise there since Shibayama is a minor character. He is shy and gentle yet determined. It was clearly shown that he respects Yaku as a libero and as a senior. And I think that also goes with his other seniors like Kenma.

Remember during the match against Nohebi, when Yaku was injured and he was called in as a substitute, Kenma suggests that Shibayama only rotates with Lev. Some may see it as Kenma not acknowledging his capababilities as he is far less skilled as a libero.

But I personally think, Kenma suggested it so that Shibayama can prove his value to the team and to make him realized the responsibility of a libero which Shibayama accepted wholeheartedly.

Lastly, we have Tamahiko. The only thing we got from him that'll connect with Kenma was when he noticed Kenma's change in behavior during the last set of their match against Karasuno. As a setter, he probably also looks up to Kenma.

That's why whenever Kenma plans and strategizes before and during every matches, the team just follows him with unquestionable faith that even Nekomata-sensei agrees on, trusting Kenma willingly.