I'll answer for his character. I know him very well.とは 意味・読み方・使い方

I know him very well.

I know well when it comes to him.

I know him like a book.

I know him quite well.

I thought that he looks very nice.

I know for certain that he is a man of great importance.

I am familiar with the way he asks questions.

I'm familiar with the way he asks questions.

I am not familiar with his character.

I had worked with him before, so I knew him very well.

I regard him to be an honest person.

I'm sure about his name.

I am well acquainted with him.

I know a good side of him.

I don't know him very well.

I'm familiar with the way he asks questions.

I know well enough what he's up to.

He is, so far as I know, a good guy.

As far as I know, he's a nice guy.

I am familiar with his music.

I had that kind of feeling about him.

I know him jolly well.

As far as I know, he is a reliable person.

As for that, he knows all about it.

I don't know much about those rules, but I'm sure he'll teach me.

I will vouch for him [his honesty].

I am convinced of his innocence.

His plan seems very good from my point of view.

I know that from hearing it from him.

I'm happy to know he was doing his best.