Talk:Ginko (Mushi)/@comment-37.160.110.149-20181130042225/@comment-27002267-20181130124322

Ginko lost his memories and also lost his eye and had his hair turn white because he was victim to both the Ginko and Tokoyami mushi. After being swallowed by the Tokoyami, he was exposed to the light of the Ginko that resided inside the Tokoyami, and was forced to sacrifice both his eye and his memories in order to escape from being transformed into the Tokoyami darkness himself.

In Episode 12, the Tokoyami later consumes the fish's second eye as well, not just the first. The reason why you have to close one eye is not to "spare" it. Not closing the eye would show no sign of surrender, and the Tokoyami will consume you without even sparing your life. Closing one eye shows that you are willing to surrender and sacrifice your other eye, and by doing this, there is a chance that you will be spared.

Because each episode have individual different storylines, there are sure to be plot holes as one episode cannot possibly tell us the whole story about each case. But the concepts that are presented in them are very logical to me. The reason why you think the author is simply throwing a bunch of dramatic scenes around might just be because you don't understand these concepts.