The conversation with Red-eyed Guding made Sea Emperor abandon the idea of telling Guding what he'd seen.
In fact, it was only now that Sea Emperor had seen the real secret hidden within Guding for the first time, but he was unable to determine what it actually was. All he knew was that it wasn't one of Guding's split personalities.
Personality splits typically occur in individuals with less psychological resilience, surfacing to handle certain issues the main personality can't resolve. But Guding didn't have this issue; he was always optimistic and fearless, without any conditions to develop a split personality.
Moreover, if it had been a split personality, its strength would also be limited by Guding's cultivation level. Even if it were stronger than Guding, it couldn't have possibly crushed Deadpool so effortlessly.
Considering everything, Sea Emperor ultimately decided to follow Red-eyed Guding's orders and keep the secret from Guding for the time being.
