These three avatars were one with him, so as the owner of the Primordial Spirit, he could freely enter any of the three avatars, replacing them and taking over control of their bodies.
What was more important was that the title panel followed his Primordial Spirit, not the body. Therefore, whenever his original Primordial Spirit inhabited any of the avatars' bodies, he could use all the title effects. This way, he could ensure absolute security.
Between Dongfang Bubai and the Hua Tuo avatar, Lin Yi chose the latter, namely the Pedestrian A avatar. Although in the Demon race, such an ordinary Human face would attract considerable attention, it at least made moving around easier.
The Hua Tuo avatar was formed from the Golden Nascent Soul in his Middle Dantian, and this Golden Nascent Soul was the embodiment of his Golden Core Dao Fruit, which he called the Golden Human Infant.
