Shelly

Shelly Boyar-Hardt is Hope's BFF, and she and Hope shared a superhero obsession as children.

Before the Books
When Hope was fifteen, Shelly jumped to her death, an origin chaser convinced that the fall would trigger her own breakthrough. But in a way, she got her wish: the Teatime Anarchist used 22nd Century technology to record a quantum-copy of her mind to use as a seed for the Artificial Intelligence CPU of a computer system in which he stored all of the historical files he collected in his trips to the future.

Wearing the Cape
The Teatime Anarchist tricked Hope into accepting a neural-link from the same advanced technology, which Shelly can use to share Hope's physical senses and even shape virtual realities for her, allowing Shelly to appear to Hope as a virtual-ghost. She also remotely pilots robot drones - Galatea - as a Young Sentinel.

Young Sentinels
In Young Sentinels Shelly's brain casing is damaged in the blast that defeats the Green Man. Rather than let her die again, Hope uses the Wishing Pill, received from Ozma, to resurrect her. She is more than successful: Shelly's mind is saved in a new, living body, while her digital self dies - and then revives minutes later, having lost her experience from the past several months. The two Shellys are able to integrate to a point, but there are now two Shellys: A living, breathing Shelly who goes on to work in threat detection for the DSA, and Shell, Astra's quantum ghost co-pilot, and Galatea driver.