- "The Great Fairy Cotera... Only a few remain who know this, but this village was built under her watchful eye. The mysterious power of Cotera is that of sacred protection... I suggest you seek her out."
- — Impa
According to Impa, few people nowadays know that Kakariko Village was built under her watchful eye. This implies that she protects it with her mysterious sacred power, thus explains how Kakariko Village and the Sheikah inhabitants survived the Great Calamity then faced the threats of surrounding monsters and the rival Yiga Clan during the Age of Burning Fields.
Since the Great Calamity, few people visited Cotera's flower fountain and she was starting to waste away by the time Link first meets her. Cotera requests an offering of 100 Rupees from Link, or more if she is not the first great fairy encountered, to restore herself to her former glory. Upon being rejuvenated from acquiring the Rupees, Cotera will offer to upgrade Link's armor if Link is able to provide her with the necessary crafting materials. She will propose better armor upgrades once Link rejuvenates her sisters Kaysa, Mija and Tera.
Like her sisters, she shows affection to Link when she upgrades his Armor. For Level 1 upgrades she blows a kiss, for Level 2 she kisses her finger and touches Link's forehead, for Level 3 she kisses Link as he bashfully cowers from her advances, and for Level 4 she suddenly grabs him and affectionately holds him, before pulling him into her fountain, and the screen momentarily fades to black before returning back to the spring where Link is lying on the ground gets up finding his selected armor has been upgraded completely.