So, let’s talk about Aizetsu for a moment — she’s one of the more intriguing secondary characters in Demon Slayer, also known as Kimetsu no Yaiba. Now, while she might not be front and center like Tanjiro or Nezuko, Aizetsu definitely leaves an impression. She’s often referred to as Hantengu’s Sorrow, which already gives you a hint about her emotional depth. Originally human, Aizetsu came from a family of demon slayers who were pretty notorious — not exactly known for their compassion, let’s put it that way. They were harsh, even cruel, toward demons. But life took a sharp turn when Aizetsu herself was turned into a demon. And honestly, that transformation changed everything.

From that point on, Aizetsu found herself wrestling with intense feelings of guilt and regret. It wasn’t just about becoming what she once hunted — it was deeper than that. The weight of her past actions crushed her, and that inner turmoil actually shaped her powers. Yeah, that’s right — her abilities are tied directly to emotion. Aizetsu can absorb negative emotions from others and reflect them back. Pretty unique, right? It’s almost poetic, really — someone so full of sorrow ends up mirroring the pain of those around her.

We first meet Aizetsu during the Demon Slayer Corps’ mission in the mountainous region, where strange things have been going down. She shows up alongside a group of other demons, all under the control of Hantengu, one of the Lower Moon demons. At first glance, you’d think she’s just another enemy, but there’s more beneath the surface. Despite being a demon now, Aizetsu isn’t purely evil. Her internal struggle adds layers to her character, making her feel surprisingly human — well, as human as a demon can get. And that empathy? That ability to feel and reflect pain? It really underscores how emotionally taxing this whole demon-slaying world is — for both sides.

Now, if we dive into personality types, Aizetsu fits the ISTP mold pretty well — Introverted, Sensing, Thinking, Perceiving. You know the type: quiet, analytical, action-oriented. Aizetsu tends to keep to herself, doesn’t seek out deep emotional bonds, and handles problems with cold logic. Classic ISTP energy. She’s independent, resourceful, and adapts quickly — remember, she can change her shape to suit any situation. That kind of flexibility? Super useful when you’re fighting elite demon slayers.

And yeah, Aizetsu does have a bit of a thrill-seeker side. There’s a certain intensity in battle that seems to draw her in — not because she’s bloodthirsty, but because it gives her a sense of purpose. ISTPs often thrive under pressure, and Aizetsu is no exception. Plus, she absolutely hates being controlled. Even though she’s aligned with Hantengu, she follows on her own terms. That fierce independence? Another hallmark of the ISTP personality.

But here’s where it gets even more interesting — her Enneagram type. Aizetsu lines up strongly with Type Six: The Loyalist. Now, that might seem contradictory at first, especially given her solitary nature. But dig deeper, and it makes sense. Aizetsu craves security, stability, and a sense of belonging. She clings to Hantengu not just out of fear, but because being part of something — anything — helps ease her anxiety. She knows what they’re doing is wrong, yet she stays loyal. Why? Because the thought of being alone terrifies her.

That fear of isolation shapes a lot of her behavior. She avoids making decisions on her own, prefers structure, and often tries to play peacemaker during conflicts. She wants harmony, even if it’s a fragile one. And while loyalty can be a strength, in Aizetsu’s case, it sometimes traps her in toxic situations. Her need for safety overrides her moral compass, pulling her toward darker choices.

So, putting it all together — Aizetsu is a complex figure shaped by guilt, fear, and a desperate need for connection. Whether you look at her through the lens of MBTI or Enneagram, the core remains the same: she’s a being torn between worlds, struggling to find peace. And honestly, that’s what makes her so compelling. Aizetsu may be a demon, but her emotions? Those are painfully human.

In the end, Aizetsu — Hantengu’s Sorrow, the empathetic warrior, the conflicted soul — stands out not because of her power, but because of her pain. And in a series filled with tragedy, Aizetsu reminds us that even those we see as enemies can carry burdens heavier than we realize.