He is the 3rd person in line.

You are my favorite character in the book.

You are my best friend.

I am the first person to arrive at the party.

He is a doctor.

The internet can be a breeding ground for personal attackers.

The personal attackers targeted the victim's online accounts.

She is the go-to person for all our technical issues.

The ape-person is believed to be an ancestor of modern humans.

I posted a personal advertisement on the bulletin board.