Debi seemed to flinch, and Padma wished for a moment that she hadn't brought it up. But then Debi went on, and Padma found herself nodding.
"There were," Padma said. "From what he's said, he was apparently dead for a number of years before Bellatrix Lestrange brought him back. The way she did it caused two souls... two minds to inhabit his body, and when Voldemort - the Dark Lord that Harry defeated - was trying to get out of the Veil, he called to his Death Eaters, including Barty. So the part of him that was... evil, for lack of a better word, got strong and started taking over."
Padma frowned down at her tea, wishing that she could have done something to help him before things had got so out of hand with him. "But the good part of him kept trying. He came to me for help, but I couldn't... the bad part of him took back over. But in the battle, he saved my life and when he hit his head, apparently the souls fused. I've talked to him since then. He's... normal again. One soul - one good soul - is what he has now."