He usually has blond hair.It changes his face and body according to his basic perception of attractiveness which slightly changes every time he sees a new face to the point that even his friends have had trouble recognizing him. It is suggested that his power allows him to become skilled at anything he focuses on for an extended period of time.
Oliver was a member of a professional-level video game team on Earth Aleph. When the Simurgh attacked Madison, Wisconsin on Earth Bet, she took several buildings from Earth Aleph- including the building Oliver was in- which left him stranded on Earth Bet with his friends. After Francis found a suitcase full of Cauldron superhero serum, he and Noelle only took half a dose.
↑Oliver – A member of the Travelers, a blond boy who takes a more backseat role on the team. - Cast (Spoiler Free)
↑Oliver was taller than him, now. The baby fat was gone, and he was fit. Krouse had wondered at times why Chris had been so attractive to the ladies. He didn’t wonder with Oliver. Oliver was attractive in a way that meant he could model, he was naturally athletic, he was even smart. It was scary how fast he was picking up new skills.
But he was still Oliver. Whatever gradual transition his power was offering, it hadn’t changed the person at the core of it; an insecure, socially stunted teenage boy. In a way, it had made it worse. Oliver’s face and body changed according to his basic perception of attractiveness, and that changed a little every time he saw a new face. In little ways, his face changed day by day, to the point that it wasn’t always easy to recognize him. - Excerpt from Migration 17.8
↑Oliver (Returned home) – A noncombat member of the group. He gained powers that alter his appearance and improve his ability to learn or physically better himself. - Cast (In Depth)
↑ 6.06.1I opened a doorway, and I found one individual I’d left behind.
The boy with the changing faces.
The number man had said he’d taken a dose that had been focused on helping the entities be human.
I couldn’t change his face intentionally.
As it turned out, I didn’t have to.
I could feel Scion’s reaction, through my senses and the individuals I controlled.
Hope. For just a second. Not even the faint hope he’d experienced with the fake my teammates had put together.
Because somehow, this boy registered as being like this entity’s companion had been. Registering as the same state, as the power that made it so similar.
In the moment that hope died, the girl with the injured hand used her power on the iron rods. Infused them with the energy he was afraid of. - Excerpt from Speck 30.6