Found this under the "conditions" section of this site ....

Under Dissociative Disorder NOS:

Examples include:

• Clinical presentations similar to Dissociative Identity Disorder that fail to meet full criteria for this disorder. Examples include presentations in which a) there are not two or more distinct personality states (nope), or b) amnesia for important personal information does not occur. (yes)
• Derealization unaccompanied by depersonalization in adults. (ETA: Mal has both, not one without the other.)
• States of dissociation that occur in individuals who have been subjected to periods of prolonged and intense coercive persuasion (e.g., brainwashing, thought reform, or indoctrination while captive).
• Dissociative trance disorder: single or episodic disturbances in the state of consciousness, identity, or memory that are indigenous to particular locations and cultures. Dissociative trance involves narrowing of awareness of immediate surroundings or stereotyped behaviors or movements that are experienced as being beyond one's control. Possession trance involves replacement of the customary sense of personal identity by a new identity, attributed to the influence of a spirit, power, deity, or other person, and associated with stereotyped "involuntary" movements or amnesia. Examples include amok (Indonesia), bebainan (Indonesia), latah (Malaysia), pibloktoq (Arctic), ataque de nervios (Latin America), and possession (India). The dissociative or trance disorder is not a normal part of a broadly accepted collective cultural or religious practice. (See p. 727 for suggested research criteria.)

Mal has highlighted in bold the things above which pertain to its situation.

Of importance to note would be the last item, "not a normal part of a broadly accepted collective cultural or religious practice." In Mal's case, inhabitation by entities of superior intelligence, vast cunning, and questionable (and variable) moral alignment, part of another species considered "trans-dimensional" (i.e., non-corporeal and thus not limited to the geotemporal mapping of 3-dimensional solids moving in a one-way linear vector through a fourth dimension called "time") would not be considered normal or accepted by any of the Western spiritual cultures or religions it has investigated. The three major monotheistic "semitic" faiths, of course, vary between either modern secular non-acceptance of the phenomenon at all to decided disapprobation thereof. The major occult traditions (ceremonial magick, etc.) term it "obsession" and consider "takeover" by any entity or entities to be symptomatic of loss of control and thus failure to make proper or effective use of magickal tools and techniques taught to the initiate for the purpose of binding, banishing, and otherwise asserting dominance over the unseen realm which has traditionally been regarded as the default right and privilege of mages, adepts, etc. Even in classic demonolatry and diabolism, no less, Mal's condition would be considered an aberration (and as such, an embarrassment to the community at the very least along the lines of providing Really Bad PR ). Likewise, shamanic trads and praxis and other similar minority spiritual cultures still extant in the West share similar views concerning the matter, with the key issue being the loss of control both over the entities and over the self.

No cure exists for this condition that Mal has found to date, neither among the religious/spiritual healing arts nor among the secular psychiatric schools, at least, not the modern variety dominated by psychopharmacology. The medications it has experimented with thus far have created intolerable side effects while failing to bring any alleviation and, in fact, acting more along the lines of tying someone down FOR rape rather than giving them locks and bars to keep the rapists OUT. In other words they incapacitate rather than either ameliorate or empower, in Mal's experience. Granted, it has not tried them all, but it has tried a couple different "mood-stabilizers" and AT-APs and found them ineffective and in most cases, detrimental.

The fragmented consciousness phenomenon referred to in the OP happens to be a distinct component separate from the stuff described here. But it interlaces with it in strange ways, like having two things woven together sometimes you notice the warp, sometimes the weft.