A Jungian perspective on Sensui
I rewatched Yu Yu Hakusho, a show I loved when I was 12. I remembered it as excellent but couldn't have told you why; it took the rewatch to see it. The answer is depth — this piece ↗ found on reddit is a good companion. Here's my reading of the Chapter Black saga through a Jungian lens.
Both Sensui and Toguro converge on the purity of their pursuit. Toguro's pursuit is to seek physical strength through adversity and external pressure. For Sensui, the pursuit is much deeper philosophically; it is about the truth of human nature and the shadow we refuse to own that lies deep in our psyche. Shinobu's purity is his greatest attribute but also his fatal weakness. Unable to hold opposite moral truths regarding the nature of humans and demons, his psyche fractured into 7 alters (of which 4 were revealed during the saga), spiraling into an extreme case of dissociative identity disorder (DID). In the Jungian sense, this would be a textbook example of the shadow integration failure. Through dissociation, Sensui has effectively imprisoned his shadows to get rid of the weight of guilt and misery: Kazuya carrying the cruelty, Minoru the charm, while Shinobu's moral purity stayed untouched.
The end of the saga is projection as fate. An inner situation left unconscious appears outside as fate. Having failed individuation within, Sensui enacts it regardless. The barrier between worlds is his own partition at cosmic scale. The tunnel is the repressed shadow forced open, humanity's judgment staged in the collective unconscious …