他的个性很独立。

Tāde gèxìng hěn dúlì.

She has a very independent personality.

我很了解她的个性。

Wǒ hěn liǎojiě tā de gèxìng.

I'm very familiar with her personality.

每个人都有自己独特的个性和兴趣。

Měi gèrén dōu yǒu zìjǐ dútè de gèxìng hé xìngqù.

Everyone has their own unique personality and interests.