Sunstreak was put onto a team led by Tigra to catch Stegron, who was attacking S.H.I.E.L.D. bases all over the United States. After their first attempt to catch Stegron in South Dakota failed. They later caught him in Wyoming.
Sunstreak was later disgusted when opening her graduation papers and learning she was to remain for further training, alongside Prodigy.
Her status after Osborn's dismissal is unrevealed, but Steve Rogers thought of using Butterball's connection with Sunstreak, and thought about integrating her into the team in order to reform her.
Sunstreak could fly, and project a 'solar lance' from her hands, which she claimed to be "hotter than the heart of a volcano". While 'powered up', her head was covered by flames.
The source of her powers is unknown.
According to Sunstreak, she can never permanently lower her body temperature to normal. As a result, she would inadvertently smolder playing cards if she held them too long, and had difficulty maintaining intimate contact with another person.