YOU SAID:

my sister is nice but had a friend that we now know is mean

INTO JAPANESE

私の妹は素敵ですが、私たちが今知っている友人が意地悪です

BACK INTO ENGLISH

My sister is nice, but the friend we know now is mean

INTO JAPANESE

私の妹は素敵ですが、私たちが今知っている友人は意地悪です

BACK INTO ENGLISH

My sister is nice, but the friend we know now is mean