You can see results for your personas using 3 tools: individually with the contact's profile, or globally, with Analytics or with the search function.
Required plan: Grow or Boost |
Contact's Profile
In the contact's profile, you can see if a contact corresponds to one or several personas:
Analytiques de contacts
In Analytics -> Contacts and Journey, select Personas in the dropdown menu at the top of the page: 
Contact Search
In the advanced search interface, you can add a Personas search criterion:
This way, you will have the list of all contacts corresponding to the persona(s).