Initially, Cayetano split his soul into two parts, with his will escaping alongside Lloyd, while his Soul Substance remained behind entirely.
Logically, such a vast and pure Soul Substance could have been used for many purposes, but for some unknown reason, Sangui Yilande's boss "Neck Pincher" never did so.
All he did was continuously erase any new will that might emerge from the Soul Substance, then power it up to maintain the Soul Substance's vitality and integrity, keeping it in a state of perfect embryo.
As a result, Heine benefited.
After the sacred site at Solins Peak was purified, the Dragon Soul was summoned, slipping away discreetly and taking a bunch of extras with it.
Then it was purified and gave birth to a frail new consciousness called "Ying" under Sangji's care.
"Ying's" intelligence level was hardly superior to that of a toddler, which was probably the main reason Buzina didn't consider it to be "Predecessor Cayetano."
