Ingenue is described as an attractive woman, and had been so for all her life. In her teenage years, she fit well with what would become her cape name. In her years of imprisonment, she had matured, and while still beautiful, she had lost the ability to pull off the wide-eyed innocence that had made her so effective early on.
Ingenue's power works by boosting one aspect of someone's power in exchange for dropping proficiency in another. This has the unfortunate side effect of driving her "partners" homicidaly insane after prolonged periods of use. These thralls are noticeably off-kilter to those who know them.
Ingenue can also change her personality into her target's 'ideal woman' which makes manipulating them easier. It was also implied that she may be able to see passengers and trigger events. It is also possible she could see a person's abilities like Chevalier could, if in a more detailed and specific way.
Ingenue ended up in the Birdcage after manipulating four heroes into doing horrible things behind the scenes. Responsible not only for their deaths but also the deaths of others due to the heroes actions while under her thrall.
When Panacea was sent to the Birdcage. she was placed in Lustum's cell block. When a meeting was called to discuss the payment for this favor, Ingenue attended yet kept silent throughout the entire meeting, letting the other leaders egos clash.
↑ 2.02.1All in all, there were twelve cell blocks with leaders. That meant that there were eleven leaders with eleven lieutenants arriving. Acidbath, Galvanate, Teacher, Lab Rat and Gavel were leaders of the cell blocks on the men’s side of the prison. Lustrum, Black Kaze, Glaistig Uaine, String Theory, Crane and Ingenue were the female leaders. There were other cell blocks, but twelve was generally agreed on as a good number. It left room for discussion without too much chaos, and it left enough cell blocks leaderless that they had elbow room to do business elsewhere. - Excerpt from Interlude 16.z
↑ 3.03.1Ingenue, not quite the pixie I’d seen in her mug shot, eight years later. She’d been wide-eyed and cute before. Now she was an attractive woman, but not quite someone who could have starred as the girl next door in a teen movie.
Hopefully she had changed in her habits, as well. She’d partnered herself with three male capes, heroes. They had gone to the Birdcage, and records suggested they hadn’t survived more than a day after her return. When the fourth partner had used his power to poison a town’s water supply, killing nearly a thousand people, people started wondering about the common denominator – the girlfriend. The fourth had gone to therapy, and Ingenue had made her way to the Birdcage.
She extended a hand, pointing a painted nail, and swept her hand over the crowd. She settled on her target.
Her walk was a practiced one, with a swaying of the hips, an unhurried pace. She approached Chevalier, then wrapped her arms around him, raising one leg off the ground. Chevalier, for his part, didn’t move a muscle. - Excerpt from Extinction 27.3
↑Chevalier remained where he was, hands on the handle of the weapon, making eye contact with Scion. Ingenue was only a short distance behind him, looking more like she was dressed up to go to a club than to be on a battlefield, with a little leather jacket and a dress with the slit up one side, her hair draped over half of her face. - Excerpt from Speck 30.2
↑Ingenue’s power was to muck with other people’s powers. More power, at a loss of control, more control, at a loss of range. Her choice.
If I had to guess, it mucked with people’s heads. Maybe something to do with their passengers. Her partners tended to go loopy at some point. Homicidal loopy.
Chevalier’s cannonblade grew to three times the size in heartbeats. Not the gradual growth of before. It was a wild, reckless growth. Unfettered by restrictions he’d been held by before.
Ten, twenty times the size. I’d seen it be as long as Leviathan was tall, and this dwarfed that by a factor of two.
The weapon was too heavy for him to lift. He let it fall, the serrated blade biting into the earth on the other side of the portal. - Excerpt from Extinction 27.4
↑“He’s running the Protectorate from a hospital bed,” I said. “And they’re trying their best to keep Ingenue from visiting. He’s refusing to be healed until all of the other patients have been treated.” - Excerpt from Cockroaches 28.6