I added a mini-CS to Ahrazan's entry, detailing Melekeshar's nature somewhat. I'll post it here for immediate reference. Let me know if it's too abstract or out-of-place, Hidarii:

Name: Melekeshar
Race: Spirit-esque entity
Gender: Appears as male

Age: Immutable
Age Appearance: Varies on physical form

Elemental Affinity: Fire

Alignment/Affiliation: Shifts between flavors of Neutral

Rank/Occupation: Patron spirit of the Ohlgar tribe, Multifaceted spirit of martial power, honor, glory, etc.

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Appearance: Melekeshar's physical appearance may change at will, from a mortal warrior, to a demonic hound, to a knight's destrier. Just about anything he wishes he can replicate, although most often, his forms are representative of war. The Ohlgars favor this particular form; an armored demon with hoofed feet, wings and a horned, dog-like face:
[img=http://i973.photobucket.com/albums/ae218/AbsolutCharlie/WHFB/Bloodthirster_charging_zps7c1c0ff5.jpg]
 
Personality: Melekeshar was birthed when mankind was still young; when that race of beings first felt the call of war in their hearts. He has lived among men since their dawning, and his knowledge is vast, primeval and beyond the comprehension of most mortals. However, there are other entities which embody the same concepts as he, for the consciousness of the living has inadvertently spawned a great many spirits at different points in time. Also, it is important to note that he was created out of human consciousness - and has no inherent interest in other races, although can recount their history. Melekeshar in particular takes great interest in the plights of man, and Ahrazan is by no means the first to enjoy his company. 

As the spawn of a mortal concept, Melekeshar is far from a god, per say. However, he is powerful in his own right. As he is not a mere living being, he innately lacks the concept of morality as humans know it, acting much beyond the thought process of mortals. Such is evident when he tasked Ahrazan as his champion, to seek and defeat other esteemed souls. He acts on his own whims, yet his whims are constrained, only due to his embodiment of particular concepts (a few of these being martial power, honor, glory, etc. as named above). Therefore, he can be expected to act honorably and so on. 

History: As recounted above. Melekeshar's history would span from the earliest years of the world on; much too great to cover in detail!