In Chainsaw Man chapter 188, Tatsuki Fujimoto may have hinted at the true master of the Aging Devil. The chapter started with Yoshida being regurgitated by Denji after asking Pochita to bring up a ...

In any case, there’s clear religious imagery being used here by Fujimoto. Additionally, former Minister of Finance Tadashi Hasegawa worshipped the Aging Devil with a similar level of devotion.