
Please no romance, let her be in peace. But I know this will be in vain because all badass female always have a man besides her *sigh* God why can't we have a badass female with no romance for ONCE

This one might have no romance, just two strong FLs and friendship, one of supporting male character loves the first FL tho but still the story isn't focused on romance
https://www.mangago.zone/read-manga/i_want_to_be_you_just_for_a_day/

Oh---hmm, technically an anime and not a manga but I really liked Le Chevalier D'eon. The plot was very interesting and so was the ending.
The main character is a nobleman who is possessed by the ghost of his dead twin sister. She takes over his body to slay demonic curses, and he gathers companions to unravel mystery of how and why she died.
The dead sister is really cool, and hot, and has badass villainess vibes. It was more story focused than romance focused.
CURTIN U LOST YOUR DING DONG, MY MAN WHY DID U CHOSE THAT CAT BAHAHAHAHAHAHAH