>>725816424
>He arrived as a slave and was acquired as a slave.
He's given to Nobunaga as a slave but immediately treated like any other Japanese person under his tutelage. He's also allowed to make executive and rash decisions like said challenge during an important meeting. He's also allowed to directly counter Nobunaga's mindset or show weakness and doubt in front of him like then they're attacking Iga.

Nobutsuna also outright says he's "shaken off bondage".

>>725816496
He didn't. Yasuke is a permavirgin in canon who dreams about having multiple kids on his own homestead. He rejects or friendzones every woman he comes into contact with. Everyone keeps trying to act like the romance options are something you can do in the canon version of the game when they're only available in fanfic mode.