If you want to open sharingan in Huo Ying, you must have the special function of the immortal eye, and Asura's reincarnation only has a special chakra and an immortal body. Most of Huo Ying's fate comes from the last night of the BOSS, including The Samsara of Saringen and White Eyes. The latter two abilities were passed on to his two sons respectively. Among them, Ootutuki Hagoromo inherited the ability of Ye Hui and Saringen and the ability to roll their eyes (there is a difference between the animated version and the comic version. In the animated version, Ootutuki Hagoromo first turned on sharingan, and then got the ability to roll his eyes, but in the comic version, Ootutuki Hagoromo rolled his eyes for the first time. Later, Ootutuki Hagoromo continued to marry Huo Ying's master, and Ootutuki Hagoromo's two sons inherited Ootutuki Hagoromo's immortal eyes (due to Tara)
As we all know, people with special eye blood like sharingan can drive, but people of other races can't. Even the reincarnation of Asura is not accepted. Many people think that sharingan's eye irritation to chakra is not special. Is there a special chakra in Asura's reincarnation? Personally, I think this is because of the relationship between Darla and Asura. Secondly, Datura and the descendants of Datura inherited the characteristics of the eternal eye, and only by stimulating the brain sharingan with special chakra can it be opened smoothly.
Let's take the opening ceremony sharingan as an example. First of all, due to the reincarnation of Datura, Yusuke has the characteristics of immortal eye and special eyeball structure. After experiencing intense emotional stimulation (she was released from Harle by the weasel in the Uchiha Itachi Massacre), she was able to successfully open sharingan.
Many people will think, if Asura reincarnates chakra and Asura at the same time, but does not have the characteristics of the eternal eye, can sharingan be opened? According to the settings in the play, it is not feasible. We also take Asura as an example to show that Asura inherited Ootutuki Hagoromo's immortal body and was at a disadvantage in the confrontation with Tara. At this time, Ootutuki Hagoromo called on everyone to gather in chakra to help Asura (Ootutuki Hagoromo once put his own Asura after Injong was established.