Looking for an MC So Cool, Even His Enemies Respect Him

Yo! Konnichiwa. I need your help.

I’m kinda new to anime but absolutely love it.

So, I need a few recommendations, but with some conditions:

• The main guy needs to be cool, badass, and preferably cold as ice—like he just walked out of a dark backstory and doesn’t care about anything (but secretly does).

• Mysterious aura? Yes, please. I want an MC who looks at people like they’re NPCs.

I want that "I fear nothing and destroy everything" energy, but also not just mindless fights—give me a story too. Throw your best suggestions at me!

Arigato!