[Updated Stats]
Personality features: Michi has calmed down significantly. He can still be a bit derp, but it's much harder to get him to laugh or smile or show genuine positive emotion. He's seen a great deal, and the constant stream of prayers and visible human suffering and failed relationships with humans has led him to stop trying to reach out emotionally to those he doesn't completely trust.
If asked (or where needed), he'll take up the role of Judge again, but he is not the one who will carry out the punishments. Humans will be punished by humans, angels by angels.
In terms of mental health... well. His mind was originally human, and so it's hard for him to deal with the full extent of his powers. He sometimes needs to take time to "shut down" (basically, nap) and process things. In addition, he has his own things to deal with - another presence, though it's hard to tell who (meaning: mun is still digging through relevant mythology) that's been trying to nudge him towards wiping the Earth clean.
Physical features: Changable at will, and he's got a lot of practice with doing so. His wings are now pure white, though he still has four of them. It no longer causes pain or bleeding when he manifests them.
He does not need to eat at all, or even breathe. He can't get sick or poisoned or anything like that unless it's by supernatural means. He can choose to ignore non-supernaturally inflicted wounds and heal them instantly. He also needs to choose to feel pain or heat or anything.
The biggest exception to his no-injury rule is, of course, the King of Bel.
His skin generally feels warm to the touch, no matter what the actual temperature outside his body is.
Aura/Other features: His aura is generally quiet and subdued. However, its alignment has shifted very heavily towards Lawful. Anyone who can pick up such things would note that there is almost no trace of demonic power in it anymore, despite his own personal alignment. The only sort of demonic power would be a very brief flash every so often, and it would be very faint.
He can still do his old aura tricks (being a ninja, expanding it to grab attention).
He can also, of course, still do The Voice. He also still has Dike, but doesn't use her.