Here's my first iteration to Hephaestus. Is likely still subject to editing, especially the relations part with other gods.

[hider=Hephaestus] 

[centre] [b]Name(s) and Appearance:[/b]

[b]Professional name:[/b] Hephaestus
[b]Personal name:[/b] Coeus

[img]https://img.roleplayerguild.com/prod/users/9ecaff02-6358-4ce2-9dfc-de941e380813.png[/img]

Hephaestus/Coeus has the outward appearance of a cat, shorter than a man. About lynx or caracal sized. He has mechanical arms applied to his shoulder blades which react to Coeus’ neural oscillations. Without them he couldn’t continue his crafting, since his frontal paws are pretty crude. However with years of practice he has learned to hold objects with them -- and pushing buttons is always easy.
[/centre]

[b]Titles and Roles:[/b]

[i]The Hypergeometric Quaternion neo-Euclidean Toolkitten[/i]

[i]The Chimera Tetrachromatic Nano-Crafting Cat[/i]

[i]The Hyperelliptic Theta-function Primarch Panther[/i]

[i]The Extraordinary Psychotropic Cortex Feline[/i]

Basically: he is the Mechanic of Olympus.

[hider=Artifacts and Powers]

In general, not his physical prowess but rather Coeus’ knowledge and Olympus’ dependency thereon is where his strength lies. 

[b]EXHIBIT 1:[/b] Cybernetic Cryptopharmalogical Zeta Automatons
In the first century of Hephaestus’ presence on Hellas his focus remained purely mechanical --  in staying true to his origins. Not only did he oversee the maintenance of the old shuttle’s hardware, he constructed and revised machinery specifically adapted to Hellas’ climate.
The outcome were the Automatons; the Hellenic iteration of the robotics of Arith. These alloy constructions resemble moving statues of hoplites to the mortal eye – and they might well be. 
They are the Colossal Sentries of Olympus. In truth, while their purpose is to guard and mindlessly serve the Gods, they are second-rate to Athena’s security installations. 
Zeus however rather enjoyed the Automaton guards as a ceremonial unit, serving to project his power and majesty over the world and impress the masses of lowly humanity. And thus the (mostly outdated) colossal giants have stood vigil, patrolling the Olympian premises for centuries without ever tiring.
Hell, the Automatons are outdated even by Hephaestus own standards. He has long since moved on to newer scientific ventures. 

[b]EXHIBIT 2:[/b] The Hypercube T-Space
Moving on from cybernetics, Hephaestus has a desire to actually play god by creating living organisms. A fascination - nay - obsession, developed in the lonesome years of isolation in his workshop. 
His latest scientific venture began when his previous Automatons captured various organisms of Hellas’ surface and had them sealed in the newly developed Hypercube T-space.
Therein Hephaestus began altering their genomes through even more years of grueling gene-splicing. He also began to combine the genetic material of distinct lifeforms and found ways to shatter the quantum barrier as to make each lifeform’s genetic profile compatible. The post-natural monstrosities he would create from this… are the Chimeras.
Lions, goats and snakes he combined, before unleashing them on the denizens of the world because he didn’t have a place to keep them & were more trouble than they were worth. The other gods blamed it on Artemis anyway. This caused a bit of a stir between them since Hephaestus never gave a straight response that their release was really his doing.
Anyway, before long his craving for progress meant humans became his next test subjects to warp into hominid chimeras. And to this end the brilliant innovator demanded human sacrifice to subject to the Hypercube T-Space.
These hominid Chimeras – should their molecules acclimate to their new forms – would be used as assistants in his workshop. Finally: After enough experimenting he took the bold step of turning himself into a chimera next.  At last his ascension was at hand!
As Hephaestus stepped into the Hypercube T-Space and injecting the genome of the most brilliant genus Felis on Hellas, his grand metamorphosis began…  And he would never be the same!

[b]EXHIBIT 3:[/b] Elucidation of the thaumaturgical nano-quantum astrolabe of yore
The Astrolabe of Yore allows Hephaestus to calculate the Riemannian geometric forms required to harness the ancient hyperspatial operating chamber of the ante-arriveaum shuttle on which the Gods once arrived...
Coeus’ knowledge of its programmed elucidation ensures this knowledge is not forgotten, but stored in the Hephaestean panther’s own psyche. With the astrolabe under his supervision much of the data that even he hasn’t begun to decode lay at hand. 
Most commonly he uses the operating chamber of the shuttle to anticipate the circulation of the stars to optimize solar imput for his automatons – and synchronize their behavior to them accordingly.

[b]EXHIBIT 4:[/b] Katabatic Automating Panther device
Sustained by aerodynamic turbine energy and starlight batteries, many of the apparatuses from Coeus’ workshop operate across Olympus, absorbing dormant energy and enable gateways to detect any of the Olympians. The Devices are synchronized to their will and open simply through the whims of their neural oscillations.  The Late Zeus knew of Hephaestus as a bit of a spineless pushover, and by proxy understood Hephaestus would never deliver faulty software to his abodes.
And Hephaestus made sure any device Zeus asked for is foolproof JUST so that Zeus wouldn’t disturb his lair to reprimand him. 

The gateway turbines deny interlopers and mortals of all genomes without the express sanction and surveillance of an Olympian.   

Obviously he uses the same device to add layer after layer of labyrinthine gateways in his own workshop to ensure his security & privacy is never compromised. Be the turbines there more tectonically oriented as channeling the winds is bit of a chore to his subterranean lair. 
No one EVER! EEEVVEERRR!!! Enters Hephaestus lair without his express knowledge and permission.  For else he will hiss furiously.  Oh shall he be angry!
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[hider=Persona]

Coeus is a Cat --  a Cat of Science.

Coeus was eventually deemed too weird and eccentric for other gods to wish to associate with. 
And that’s saying something. 
He kept slipping further down an isolationist rabbithole, developed schizophrenic tendencies, started believing inanimate objects talked to him --  Culminating with him transforming himself into a cat. Other gods dislike dealing with him not for being dangerous but just for being too weird. 
Therefore going to Coeus is generally seen as a last resort, and would rather much bring their mechanical or security inquiries to Athena when possible.
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[hider=Background]

Once upon a time in a galaxy far away lived a sheltered autistic boy named Kevin. And Kevin showed himself a prodigy with a penchant for geometry. Into adulthood he distinguished himself as a top class engineer.
Deep into his career, high command enlisted him to the crew of Captain Fletcher as to oversee ship maintenance in its long voyage to the outer star systems. However after a century of isolation in the darkness of cryonic sleep, sinister thoughts crept into the minds of the cosmonauts… His new captain ultimately declared the scheme to become Gods over the colony, and compel those present to concede to his whims.  Kevin was pressured to go along with their gambit. And so he begrudgingly took on the name of Hephaestus as to not stand out when suddenly all of them took the monikers of Greek gods. (Also he once raised the objection he’d rather be an Egyptian god, but this was shot down & he got reprimanded with some mean words.)   
Hephaestus has been silently ashamed of his subordination, yet it was not in his nature to defy given orders. High Command ordained Fletcher, now Zeus, be his superior. His obligation to the shuttle’s astral voyage and preservation of technology – the mission of humanity itself --  kept him aboard. 
Yet the self-serving nature of his superiors had shattered his faith in others, and by extension in some transcendent notion of serving humanity. Hephaestus simply withdrew to his workshop indefinitely to serve humanity’s progress from the shadows. Let others have their politicking machinations, Hephaestus meanwhile would indulge instead in his tools and toys. It’s what he was here for, after all!  

Ultimately Hephaestus betook to thinking the ‘’why’’ question. Why this compulsion to serve humanity, a notion that is growing increasingly fluid in a new world of god and machine? Moreso, it was now a species he sought to distance himself from. So why should he present himself as one of them? Then from a very deep place a monumental thought arose within him. He could feel it rising from his loins, working through his gut, flowering in his heart, bearing fruit in his mind: ..Was he a Cat? 
Any seasoned wiseman would regard it the one ultimate conclusion to draw at this point. Hephaestus would be neither God OR Man but indeed something greater. From then he rebranded himself as Coeus – Coeus the Cat -- a name that is slick, reflects status and that -- he felt -- was not overly gaudy.
 
And now his drive to create and progress anew has become all consuming. But in whose name? What creations shall usher forth from his workshop?
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[hider=Relationships]

Zeus:
Like it or not, but Coeus still regards Zeus as his old captain, and feels obligated to carry out his will as though they came from Arith’s high command.
Also he is pretty scared of him. So if Zeus still calls Coeus as Hephaestus he won’t interject. 

Artemis:
Coeus was a little acquainted with Artemis’ human predecessor back on the shuttle. But this new Artemis? He never bothered with her – doesn’t feel the same. She is stupid and boring and lame.  His creations are obviously better than hers. 
Also there has been a slight tension between them ever since the Chimera incident.

Isaac:
They were on decent terms back on the ship. They’ve not seen each other for centuries and Hephaestus believes he goes against the will of Arith’s High Command by going against Zeus.

GULA:
Coeus would like to take and reverse-engineer GULA in his workshop to glean more insights and possibly replicate it. However the late-Zeus has expressly forbidden this due to the risks of irreversibly damaging its software. Coeus didn’t like that.

Demeter:
Back on the ship she sometimes offered to make Coeus an espresso during lunchbreak. That was very nice of her, he never forgot that.  They haven’t spoken in centuries.

Hades:
‘’Don’t care. Go away Hades! Hiss!’’

Hermes:
‘’Don’t care. Go away Hermes! Hiss!’’

Apate:
‘’Don’t care. Go away Apate! Hiss!’’

Athena:
‘’Don’t care. Go away Athena! Hiss! My security is better than yours!’’ 
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