In the book Critical Survey of Graphic Novels : Manga, Enishi's quest on his revenge on Kenshin is noted as negative, with Watsuki pointing out the time Enishi starts having hallucinations of his late sister with a sad expression on her face rather than a smile.
The book "Critical Survey of Graphic Novels: Manga" examines the character Enishi's quest for revenge against Kenshin, noting its negative trajectory. The author observes that as Enishi's journey unfolds, he starts to have hallucinations of his deceased sister with a sorrowful expression instead of a happy one.