Sagessa is a character in The Legend of Zelda: Breath of the Wild. She teaches Link that Elixirs can be created from the mixture of insects and monster parts. She is found in the Dueling Peaks Stable. She also gives Link a Hasty Elixir and tells Link that the ingredients are Hightail Lizard and Monster parts. It grants 2:10 low-level haste effect.
She can be met up with again close to a Shrine nearby and comments how shrines tend to be close to hills.