VOICED : Royal rivalry in Italian Riviera 'micronation'

Seborga, a small village on the Italian Riviera, is known for its unique status as a micronation. Nina Mini Gato, a German-born businesswoman, was elected Princess and is awaiting her coronation. Seborga boasts its own currency, police, and other distinct features. However, a rival claim by Nikola Mute from France has stirred controversy. Seborga's historical claim of housing the Holy Grail aims to boost tourism.

What are the claims made by Nikola Mute regarding his principality?

What historical claim does Princess Minnie Gato hope will boost tourism in Seborga?