1NKF1N's Rantz and Reblogz...

What exactly is Dissociative Identity Disorder, and why may Fu have it? Dissociative Identity Disorder—or DID for short— is a complex mental health condition that stems from stressful experiences, trauma, and even abuse. The disorder causes the brain to have two or more distinct identities. These identities can differ from one another. The disorder causes a variety of symptoms such as: dissociation, gaps in memory (amnesia), behavioral changes, and distress in an individual.

Other disorders can be common in individuals with DID like: anxiety disorders, mood disorders, and even eating disorders. In other words, DID is a survival mechanism the mind causes to shield the individual from the set of impossible situations that they are facing.

Fu checks most of the diagnosis criteria for DID. Chapter 98 and 132 in the manga implies that Fu had gone through something traumatic that made him the way he is now. Fu states:

"I never want to take responsibility again… Because that way… The responsibility belongs to someone else. [and I don't get hurt…]", "… I get it… You've never made a decision for yourself… That turned out to be a huge mistake." These statements from Fu further imply that the choice he made was something that scarred him deeply. The manga doesn't delve more into his past (yet), so what led Fu to abandon responsibility all together is still unknown.

Dissociation is one of the major symptoms of DID—the DSM-5 defines dissociation as "a disruption and/or discontinuity in the normal integration of consciousness, memory, identity, emotion, perception, body representation, motor control and behavior". Let's look back on what was stated before, what DID comes from—trauma (in Fu's case). Not all people who have experienced trauma end up having DID necessarily, it's actually how the person coped with their trauma. Dissociation is often a source of escape for the people who have experienced these stressful situations. It often provides these individuals with a sense of relief from what they can't escape.

Prolonged dissociation is actually one of the main contributors to DID. Too much dissociation can cause a multitude of problems such as: gaps in memory, difficulty focusing, emotional numbness, feeling disconnected from your body and the world around you, and even increased anxiety or depression. We can see an example of these symptoms in chapter 61 of the manga:

"Um… My name is… Wait what was it again… Eh, Fu Orostor. That's my name…" Fu nearly forgets his own name. This piece of dialogue can be interpreted as Fu suffering from gaps in memory, which could've been caused by dissociation or just Fu's extreme anxiety (which could also be caused by too much dissociation).

Something I noticed in the manga was how dazed Fu looks at times. Like he isn't there at all, similar to dissociation. Examples of these moments are seen in chapter 131 and 137. In chapter 131, Fu can be found standing in a corner away from the rest of the cleaners. He looks quite disconnected from everyone and everything until August pointed him out. Again in chapter 137 Fu seems to be isolated from everyone and everything else.

One thing he thought caught my eye though: "I have mastered the techniques to soften the pain of feeling like an outsider." This piece of dialogue implies that Fu could be dissociating to numb the pain of feeling like an outsider. As I said before—dissociation can be an escape for many especially for people who have been through a lot.

The development of DID happens around childhood—when the child's personality is still in the developmental phase. Between the ages 1 and 5 the wiring gets set, and around 6-12 their personality begins to become evident. Things like trauma and other situations can affect this development in a child drastically.

When a child goes through repeated abuse and trauma their feelings have nowhere to go. These children not only dissociate, some may displace their feelings somewhere else. The child often points these feelings to someone else as a coping mechanism. The "not me" experience is usually the marker of DID.

While researching I stumbled across someone that stood out to me. Trauma psychiatrist, clinician, and researcher Milissa Kaufman—her research covers many areas of trauma related disorders. Kaufman had said something about how children experience DID:

"a child doesn't have many other ways to cope. They can't turn to their parents, since that is the origin. They feel like there are other people inside of them, and they can't tell anybody." These different "people" are formed as a response to childhood trauma. DID usually presents differently in children than adults, even having different indicators of the disorder as well.

Some children who switch often have extreme behavioral switches, fluctuating skills, and usually like to be referred to with a different identity. These children have huge memory lapses between these switches—not remembering behavioral outbursts even after they occur.

Dissociation is common in these children—zoning out and being in a trance-like state is quite common for them. As I said before dissociation is a coping mechanism for some—especially children who have nowhere to put their feelings.

Let's revisit the "not me" experience in children. As I said before children will direct their feelings to someone else. That someone can be a source of comfort to the child in their times of desperation through dissociation. Fu could've coped with what he experienced in that way with his Jinki.

Now let's take a look at Fu's jinki, Hii. Hii takes the form of a well loved wooden doll, implying that Fu must've had him for quite a bit. Hii differs a lot from Fu personality wise. He's rash, rude, and aggressive, while Fu is timid, shy, and anxious. They're complete opposites from each other.

Hii can be what's considered an "alter". An alter is a dissociated self state. Alters each have their own perception of self. They all behave, act, and identify in different ways. Alters can have their own wants, needs, desires, and opinions that differ from the core/host. To clarify, alters aren't a complete new individual, but an aspect of a complete person.

People who have DID are able to communicate with their alters at times. They can communicate in various ways. One of them is internal communication through the mind. There have been multiple instances of Hii speaking to Fu—the first appearance being around chapter 78. It isn't confirmed whether Hii is speaking aloud or internally though.

There are many functions and roles alters can have in a system. There are hosts, protectors, persecutors, introjects, and so much more. Different systems have different needs, and different jobs that have to be done. Every alter has a role to play for the system to keep functioning.

Different alters have different skill sets, that's why fluctuation in skill is quite present when looking into the disorder. When switches occur the individual may lose or gain different skill sets. This is quite present in Fu if we look a bit closer. In chapter 61 Fu states:

"But… But I have to…? I don't know how to start a battle… Wh-Wh-What do I do…?!!" Fu clearly does not know how to start a battle let alone fight in one, but in chapter 98 "Fu" suddenly gains fighting skills? Like I mentioned before—individuals with DID gain and lose skill sets when switches occur due to a losing/gaining of skills between alters.

Hii is there to help Fu with what he can't do: make decisions on his own. That's Hii's role as an alter. When there's no one for Fu to rely on then that's where Hii comes in. Hii often helps or guides Fu into decisions he cannot make for himself. Fu is physically incapable of anything without orders as stated by Hii in chapters 78 and 86:

"You can't do anything without me afterall.", "You really are completely and utterly useless without me around!". This shows how dependent Fu is on Hii. Besides making choices for Fu, Hii also defends Fu in battle, the skill Fu doesn't have. Fu may have strength, but he doesn't know how to use that strength.

So, when a fight rolls around, Hii is the one who often steps up to defend Fu. This can be backed up with a piece of dialogue from the Information Broker Arc, chapter 98—Hii mentions having a pact that Fu and him had made. He states:

"When Fu doesn't have anyone to order him around… And when he's gonna bust something up! His body… Becomes my body!!" This statement can be compared to how children will come up with dissociative alters to self soothe. Evidently, this makes Hii a protective alter.

Examples of Hii stepping up as the protector can be seen again in chapter 78. "Lets swap. I'll take over from here. If we've been abandoned, then we'll just escape." Hii stepped in to make sure Fu stays protected in his time of abandonment, because without Hii, Fu wouldn't be able to do anything for himself.

The question comes up once again, does Fu have DID? Overall Fu does check out the diagnosis criteria of the disorder. He suffers from anxiety, dissociation, behavioral changes, distress, switching, having internal voices, and skill fluctuation—which are plain signs of DID all together. At the end, it's most likely Fu could have DID, but without conformation there's no going further from there.

If there were any mistakes in this analysis concerning information about the disorder please let me know !!

Citations :

Wilkinson, Simon, and Margaret DeJong. “Dissociative Identity Disorder: A Developmental Perspective.” BJPsych Advances, vol. 27, no. 2, June 2020, pp. 96–98, doi:10.1192/bja.2020.35.

“Unraveling the Layers: Dissociative Identity Disorder as a Response to Trauma.” PubMed Central, May 2024, pmc.ncbi.nlm.nih.gov/articles/PMC11185985. Accessed 26 Mar. 2026.

Science Insights Team. “When Does a Child’s Personality Develop and Stabilize? - ScienceInsights.” ScienceInsights, 13 Mar. 2026, scienceinsights.org/when-does-a-childs-personality-develop-and-stabilize.

“Multiple Personality Disorder or Dissociative Identity Disorder: Etiology, Diagnosis, and Managemen.” PubMed Central, Nov. 2023, pmc.ncbi.nlm.nih.gov/articles/PMC10730093. Accessed 26 Mar. 2026.

“DID Research Homepage.” DID-Research.org, did-research.org.

DID Explained: Symptoms, Causes, and Support. 9 Mar. 2026, deconstructingstigma.org/guides/did.

“Developmental and attachment-based perspectives on dissociation: beyond the effects of maltreatment.” PubMed Central, Oct. 2020, pmc.ncbi.nlm.nih.gov/articles/PMC7678681. Accessed 26 Mar. 2026.