That is grammatical, but the meaning is odd because the speaker would not normally have knowledge of how it was to be another person. It would be possible in some fanstasy situation where a person can inhabit someone else's body, for instance, or possibly when someone is impersonating someone else. "This is a nice place to be" is a more normal use of a similar structure.
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AnonymousShe is a nice person to be.I'm almost sure that it's incorrect. What do you think?It is not natural.