Through your veins runs the blood of the Legendary Dark Knight Sparda. A powerful demon who rebelled against his own kind to protect humanity. This too turns you into part-demon, granting you incredible physical abilities as well as various unique abilities thanks to your demonic heritage.
You start strong enough to shatter a giant statue with a single strike, being able to move at mach 20, healing strong enough to be unfazed from being stabbed and shot, and regeneration so fast that being bisected heals instantly. But be careful, your regeneration can be overwhelmed after a very long and exhausting fight.
You can use your demonic energy to teleport, create platforms in the air to jump off from, imbue your weapons and ammo with it and do possibly many other things with it.
You possess a transformation, your Devil trigger, a demonic form that increases all your powers tenfold.