Great Fairy Cotera is one of four Great Fairies in Breath of the Wild. Her Great Fairy Fountain is located northeast of Kakariko Village. It can be reached by following the path up the incline at the northern edge of the village and then heading east past the Ta'loh Naeg Shrine into the small forest there.
To open her Great Fairy Fountain, Cotera will request an offering of either 100; 500; 1,000; or 10,000 Rupees depending on how many Great Fairies have been restored to power already. Once her powers have been restored, Cotera will upgrade certain pieces of Link's armor provided Link possesses the required materials.
According to both Impa and Dorian, Cotera was once an important spirit to the people of Kakariko Village, as she had overseen its construction and supplied it with a form of divine protection. However, they are the only two residents who remember her in the present day. Dorian also alludes to Cotera's presence in the stories he tells to his children, of a sobbing woman who can be heard in the woods behind Ta'loh Naeg Shrine. While this would seem to refer to Cotera, who was trapped within her fountain until Link frees her, the younger Cottla mistakes the crying to be that of her mother, and spends each morning searching for her near the shrine.