Nami is Kushi's ancestor and they have a lot in common. Nami lived in Kamiki Village 100 years in the past and can only be met if you travel through the Spirit Gate. However she will run away from Amaterasu as she believes her to be a familiar of the Orochi.
She also shares other traits with Kushi. Like Kushi she is Kamiki's resident sake maker, this is probably where Kuchi got her skills from as it was passed down the family.
She also looks strikingly like Kushi and both of them have the same caring and kind personality. However Nami does not believe in the gods like Kushi and therefore cannot see Amaterasu's divine markings, this leads Nami to fear Ammy even though she will save her life.
Nami is also Nagi's love interest. This is similar to Kushi as Kushi has caught Susano's eye. Susano being a descendant of Nagi.
Finally the most important trait the both of the share is that both of them where chosen as the Orochi's sacrifice and they had to put their trust in their foolish lovers.
However Nami does not make it to the Orochi's layer as Amaterasu steals her sacrificial gown while she is bathing. She then dresses Nagi up in it and sets him off to fight the Orochi. It is the brave work of Amaterasu, Nagi and Shiranui that allows Nami to spend the rest of her life happily with Nagi.
 Based On
Nami is based on the Japanese Deity, Izanami-no-Mikoto. Izanami-no-Mikoto's husband and older brother was Izanagi, the deity who Nagi in Okami's origins come from, Nagi being Nami's love interest in the game. It is said that Izanami-no-Mikoto and Izanagi created many Japanese Islands, Gods and forefathers. However Izanami-no-Mikoto dies in childbirth and went to the Underworld. When Izanagi went to the Underworld to try and save her, it was too late as she had eaten the food of the Underworld and was now one of the dead and did not want to leave. Izanagi tried repeatedly to convince her to leave. Then when she was sleeping, Izanagi set his comb alight to look at her face, only to see that Izanami-no-Mikoto was now a decomposing corpse. Out of fright, Izanagi ran and this angered Izanami-no-Mikoto who sent Shikome to chase after him to kill him and promising that she would kill 1000 of his people each day.
- The sake she wears on her head is a sample of Thunder Brew.