Rubber fruit, also known as animal line, human fruit, esper species, nika form. For this situation, I really did not think of it before. A demon fruit, with two names that span both lineages, how does everyone understand it? Is it really Superman and Animal?
Personally, I think that one is a real finger and the other is a virtual finger.
The real finger refers to the rubber fruit. At the end of the manga 1043, Luffy dissolves, does not look like the characteristics of rubber fruit, and thinks that rubber fruit is not its real name. But now it seems that Luffy's demon fruit is a rubber fruit, which can be seen from its awakening to turn the earth into rubber.
The virtual finger refers to the esper species Nika. The change in Appearance after Luffy's awakening is indeed not like the normal Superman Awakening, but it is not the so-called "esper species". The reason why the rubber fruit has the name of the esper species Nika is mainly because of the rubber fruit ability that has been blank for a hundred years.
Combined with the current intelligence, Joey Boy and the "sun god" Nika may refer to the same person, that is, the rubber fruit ability that has been blank for a hundred years. Joy Boy is an optimistic and cheerful warrior who brings happiness and freedom to the people around him, shining like the sun on everyone, so he has the title of "sun god".
This means that Nika's "sun god" is not a description of the demon fruit ability, but his cheerful personality, the ability to infect others.
Therefore, the rubber fruit is the rubber fruit, and the so-called other name "animal line, human fruit, esper species, nika form" is just a description, not a demon fruit ability. Perhaps, there is really a "will of Joy Boy" in the rubber fruit, so for eight hundred years, it has been escaping the control of the world government.
Although the rubber fruit may have a will, it will not take away Luffy, because Luffy is the protagonist.