on one's person formal
about one's person formal

Not sure how you feel about a special person in your life?

Find something to like about a person and say so.

You can usually tell something about a person by what they read.

You can usually tell a lot about a person from their home.

But in general, the way to learn the most about a person is to let them do the talking.

Well now, she is about the last person he expected to see here.

Now I want you to think about the person who he's going to talk to.

He was about the only person here I could talk to.

"I would like to ask you about the person we are going to see."

Many people ask about the other person but don't really care.