Alonso, the King of Naples, is depicted as a rather weak person, easily moved by feelings or carefully spoken words; a possible reason for this is his age. He constantly wavers between Gonzalo’s good attitudes and crude flattery of Antonio. But, weak as he is, Alonso is a kind man, capable of remorse, a loving father and, as it can be seen at the end, a just king, who, after listening to Prospero’s story, immediately makes a right decision about restoration of his dukedom. He gladly accepts the marriage of Ferdinand and Miranda, understanding its consequences: a union between Naples and Milano.
Alonso in the Essays