The below are how I see the various Fantasy Folk races, as through the IN lens. Feel free to disagree: anyway, they'll be fiddled with for a while.

Centaurs: one of Jordi's projects, with Michael sitting in (the former wanted a nonhuman species with hands, the latter wanted an instant light cavalry). They both got what they wanted: Raphael helped them with the IQ problem, but died before she could finish the patch. So it goes.

Dwarves & Gnomes: Well, I'd like to avoid stereotype, but let's face it: David is a giant Dwarf. Big, strong, tough, never forgets slights or favors, even not keen on missile weapons. He's the obvious candidate ... although he didn't precisely create the Gnomes. He just gave a few prototypes to Novalis, who promptly redesigned them to get rid of those annoying personality quirks (and to get them to like the woods and stuff). Still, fairly impressive work by the two of them.

Ellyllon: Laurence's masterwork, to demonstrate that he deserved his AA status. It shows, too: these guys may be small, and their social structure may have been ripped off wholesale from old chivalric romances, but you don't want to mess with them.

Elves: God Race One. I want to make Lilith originally an Elf, and I'm not precisely sure why. Note that all Archangel's have a Elvish-looking vessel as well as a Human one.

Exalted Horses: one of Jordi's first three main projects. Pretty good, if not particularly revolutionary.

Fauns: Eli took the basic Human template and ran with it. Their creativity was planned: their lecherous natures are a side product of changes to their biochemistry, but Eli just slapped in an elegant ethical patch and called it a feature.

Ghouls: Jordi's, again, but the attempt to create a scavenger subrace of humanity didn't work very well. The Council is still trying how to figure out how to keep them from being exterminated, and not doing too well (it's this bloody War...).

Giants: Actually, this is the latest group project: nobody's worked out the ideal form for these guys, so they're still experimenting. Unfortunately, so is Hell.

Goblins: Marc's. Marc's all the way, and watching him and David argue about who did better in the Second Wave is really kind of funny.

Giant Eagles: Jordi's second great project. Again, clever but not too original.

Halflings: Actually ... well, they're Michael's.

No, really. They may be small and charismatic to most of the other races, but they're tough bastards... and have a certain propensity towards missile weapons. Besides, they make great logistics personnel - which is what he wanted in the first place. You can train warriors, but good quartermasters are precious.

Humans: God Race Two, and the bulk of the population (the others can still get into Heaven, though). Just so you know, Yves keeps and eye on the basic Elvish and Human stock ... and he has Gabriel to back him up.

Insect Men: An example of Jordi's later work, after he developed some more subtlety. Other than that, not much to say.

Leprechauns: Well, Eli does ingest a wide variety of corporeal substances, and some of them have interesting side effects.

Merfolk (Dolphins): This may be Jordi's best work: of course, he had Oannes to draw on for the first draft. They're an excellent counterbalance to Jordi's Disaster (see below).

Reptile Men: Jordi demonstrated his ability to adapt sentience to any environment quite handily with this race: however, their personality quirks were a bit problematic. That's why Khalid has them now, and doing quite well with them.

Wildmen: Well, FF doesn't have anything like Ents (a grievous oversight, in my opinion), but Novalis created them anyway. She also adapted these guys as a liaison between the forest and the Races of Man. Note that, in this universe, David and Novalis are sleeping together - simply because I think that it's funnier that way. Besides, if it was good enough for Saint John Ronald Ruell...

Winged Folk: No, Jean didn't create these: he simply slapped them away from Vapula (who is going to look very weird in this setting) and is in the process of rewriting their culture. Blandine's helping with that: considering the lack of resources available on your average cloud city, you need Dreams as teaching tools.

Bales - These nasty little buggers are what Kronos thinks humans should be like: perverted, disgustingly sadistic, ready to Call Up What They Can't Put Down and generally born with their prepaid ticket to Hell clutched in one six-fingered fist. He's grown them like a evil hothouse flower, and gets most annoyed when they get slaughtered. He gets annoyed a lot, as everybody else hates them.

Fishmen - Jordi's Disaster. You see, the original idea was to have Great Eagles in the air, Exalted Horses on the land and Noble Frogs in the sea. Unfortunately, Asmodeus got his hands on the first batch, and with the willing help of Beleth and Hatiphas (who is practically a Princess in this setting) sent them down the path to cold, ritualistic madness. Oops.

Gargoyles - Vapula wanted winged humans: Gargoyles were simply the first production run. A few managed to get away and breed up a population. Simple, no? Since then, they've been at the mercy of any Prince that needs a few test subjects in a hurry.

Kobolds - Well, Haagenti saw the Halflings and decided that Michael had the right idea, but screwed up the implementation. Why bother with refining a species that was good at delivering food when, with a little tweaking of the reproductive cycle, you could breed one that was food? The blue color is also deliberate: it makes them a little more obvious, and, besides, Haagenti likes eating blue things. It does interesting things to the color of his tongue.

Minotaurs - Well, I could go canonical, but I won't. Ronald, Demon Prince of Cows, came up with these perfect beings, and he doesn't care that everybody else thinks of them as nasty, crude buggers. They protect cows (but the reasons why should be discreetly not stated), and that's the important thing.

Ogres - Baal isn't precisely sure what he tossed into the mix to get these guys, but it seems to have worked. They make good shock troops: big, strong, tough, willing to accept being told who to hit and able to live off the land. Of course, Michael tries to isolate and 'collect' the more disciplined ones whenever he can, but you can't have everything.

Orcs - Hell's main corporeal resources (although evil Humans and Dark Elves, combined, barely match their numbers). The race is a deliberate mix of Human and Elf, with a little Dwarf and a whole lot of malice aforethought tossed in. Note, however, that a good proportion of the Orcish nature is due to their poor nutrition: a deliberate lack of protein in their infancy keeps them nice and brain damaged.

Also: have you ever noticed that you never see Orcish females? There's a reason for that: they're kept in servitude and forced to breed. However, if they show sufficient drive, cleverness and cruelty, they can get out of their bondage, and even become beautiful in the process...

Yes, there's a reason why Lilim are green.