Korgano
Korgano was the mythological moon god of the extinct D'Arsay civilization. 

He existed in counterpart with Masaka, the D'Arsay sun Goddess. Korgano was considered a more benevolent figure than Masaka; he was her nemesis, the one who controlled Masaka and made her vanish from the sky. The exchange of night and day was referred to as "The Hunt".

In 2370, the  encountered the D'Arsay archive which downloaded information into the Enterprise-D's computer and began reconfiguring the ship, replicating a D'Arsay city. It also affected Lieutenant commander Data who began taking on personalities from D'Arsay mythology including Masaka. The changes threatened to completely take over the ship until Captain Jean-Luc Picard correctly hypothesized the relationship between Korgano and Masaka. 

Picard used his knowledge of similar legends from other cultures to assume the identity of Korgano and attempted to direct the archive to release his ship. In the character of Korgano he confronted Data, as the archive's representation of Masaka, in Masaka's temple and successfully convinced Masaka to rest. This completed the legend that the archive was enacting and shut it down. ()

de:Korgano
D'Arsay
Mythological figures