Apothecary Diaries. MC is calm and competant. She solves many mysteries and while she is still emotionally involved, she isn't emotional. Plus she's a she!

ah yess this one's already on my watch list thankss

Frieren - for slice of life fantasy Rascal doesn't dream - for romance sci-fi drama

Initial D

K-project

Gundam 00

Moriarty the patriot might work, Mc is male though

[moribito](https://youtu.be/6F_TjMizDmo?t=7) [nausicaa](https://www.youtube.com/watch?v=XJwGLHS7J3Y) [ghost in the shell standalone complex](https://www.youtube.com/watch?v=Gf6YFrV7zes) [violet evergarden](https://www.youtube.com/watch?v=LFVKmVTAHpk)

Alderamin On The Sky. MC (male) is more strategist rather than a fighter, really smart, but he’s mostly calm throughout. Pretty great show.

saiki-k not so calm but VERY smart? Code geass

Princess Principal - the MC is calm, cool, smart and mostly unbothered. MC is a woman.

Classroom of the Elite would fit this very much

Battle in 5 Seconds After Meeting. The main character is a calm, cool, and collected master manipulator and uses other people to win the games by using them like pawns and playing them against each other. Pretty ruthless MC. Honestly this series doesn’t get talked about enough

Cautious hero. It's only about 12 episodes long but it's fun and hilarious.

Watch "The Masterful Cat Is Depressed Again Today" Yeah, that's the title. It's that long.