Personality: Mischievous | Wanderlust | Stubborn | Dense/Naive | Playful | Innocent | Eager to please | Indifferent towards mortals | Sweet | Friendly | Warm hearted | Wears her heart on her sleeve. | Childish | Confident to a fault | Gives bad advice | Can be petty and fickle | Thinks she knows everything. (Her views towards mortals have been molded by Muti since the mosaic is her master over the many years, therefore Io reflects how Muti feels towards them)
She is the bringer of summer in Lato, along with her siblings and friend who were gifted with the other three seasons. Nysa enjoys her season because she feels it is the best time to go play and frolick in the warmth of the sun. Her second favorite is spring which has led to her infatuation with Dikastís, leading to a slight crush on him.