1. To recognize or appreciate a particular trait or characteristic in someone or something. In this usage, a noun or pronoun is used between "see" and "in." I always try to see the good in people, even when they say or do bad things. It feels like my teacher only ever sees the mistakes in my work, never commenting on anything I do right. I can see a lot of potential in Sarah, but she needs the right motivation.
2. To show or escort someone in(to some place), especially in a formal capacity. In this usage, a noun or pronoun is used between "see" and "in." Mary, would you mind seeing our guests in? Allow me to see in Mr. Jacobs here, and then I'll be right with you.
see something in someone or something
to appreciate a certain quality in someone or something. I see a strong sense of dignity in Fred. That's good. I now see the strong points in your proposal.
To escort someone or something into a place: The receptionist sees in our visitors. The butler will see you in.