One wants a very Kincaid-like supernatural crossbreed with high skills in Guns, Weapons and even Fists.
If you're looking for for a player character level demon scion/Hellhound a la Kincaid, here is a writeup that I think could work. Feel free to adjust it to suit a tie to Mars or Ares.
Kincaid's Spartan cousin (10 Refresh, 35 skill points)
High Concept: Supernatural Soldier
Trouble: The Job Comes First
Other Aspects: The blood of Ares runs through these veins; As Human As You Are; Technology Is The Great Equalizer; Protect The Client, Tonight we dine in Hell!!!
SkillsSuperb(+5): Athletics (Hide/Skulk, +6 w/ Inhuman speed, +7 to Sprint, penalties to stealth from movement reduced by 2), Guns (no range penalty when sniping)
Great(+4): Alertness (+8 Initiative w/ Inhuman Speed), Fists (+2 dmg w/ Inhuman strength)
Good(+3): Endurance, Might (+4 to Grapple, +6 to Lift)
Fair(+2): Burglary, Intimidation (The Brush Off +4), Scholarship (+3 for Military, +4 for Tactics)
Average(+1): Conviction, Driving, Lore, Presence, Survival
PowersInhuman Speed [–2]
Inhuman Strength [–2]
Stunts (5)Cat-like Grace (Athletics): Swap Athletics for Stealth to Hide/Skulk
Extensive Training (Fists): Swap Fists for Weapons when using HtH Melee weapons
Sniper (Guns): With a properly equipped and adjusted rifle, and something to brace it against or a turn to take aim, he suffers no penalties to rolls due to range.
You Don't Want Any of This (Intimidation): +2 to The Brush Off
Scholar (Military +1, Tactics +2)
StressPhysical oooo
Mental ooo
Social ooo
Total Refresh Cost: -9