A/N: I did change one canon detail in specific, because Hakkai’s backstory has so much squick already and that (manga) canon bit with his relations with Kanan is completely unnecessary and would blow the lid off any dealings with the SGC, ever. Warning, if you do know Hakkai’s canon backstory, here’s where things get bloody. If you don’t… um. See above? Hakkai has the nickname Thousand-Slayer in canon.
The nickname does. Not. Exaggerate. Consider yourself warned.
“Sorry I’m late!” He pushed through the front door, schoolbooks in hand, ready for Kanan’s fond smile and Gonou’s disapproving scowl. Honestly, glad as he was to have found his sister again after all these years, he wished he’d been around to help her think twice about marrying a man so – stiff. And secretive. “I was seeing some students and lost track of the….”
Chairs overturned. A vase shattered on the floor, lily petals trampled underfoot. Kanan’s tools of healing scattered across her examining table; careless disarray, and the gentle Kanzeon’s favored was never careless-
Gonou, bleeding over the floor.
He dropped down beside the man, books falling where they would. “Hold on, I’ll get help!” Not that he expected it to do much good. He’d seen enough injuries to know only one of Kanzeon’s healers could save a man this far gone. Kanan, where is-?
Gonou’s hand latched onto his shoulder, dragging him down.
Strong; only youkai are this strong! Or-
Bloody lips smashed against his, and there was no time to scream.
An eternity later, he watched the world through a haze, as his body stepped over the corpse on the floor and headed for the kitchen.
For the knives.
“I’ll spare you the details.” Hakkai sipped the last of his tea, and stared into the empty mug. “Hyakugen Maoh’s people were looking for pretty girls, and a Tok’ra spy. I suppose one out of two isn’t bad, for minions.”
His sister’s voice ached in his memory, speaking to the demon inside him. She’d known. She’d known all along….
Hakkai blinked, trying to chase away the image of beloved hands taking his knife rather than bear the creature inside her. Praying, in the chaos left by his carnage, she’d be left dead long enough that not even a sarcophagus could revive her.
At least that prayer had been answered.
“Some of the survivors caught me. They handed me over to one of Gyokumen Koushu’s scientists, the one who was running a lab there. Mostly experimenting on the Maoh’s castoffs, when he didn’t have his own projects to tend. He was… very interested to see if the youkai transformation worked on a host. And of course, he didn’t want to use one of his Queen’s children.” Hakkai smiled thinly. “It takes a lot of effort, and time. But it does work. I really wouldn’t recommend it.”
“Youkai transformation?” Major Carter asked uneasily.
“Most youkai are born that way,” Hakkai nodded. “They’re sane. Well, as much as humans are. A little more prey-driven. But sane. But there are also… techniques, to transform the human – lifecode, I’m not sure of the word….”
“DNA?” Dr. Jackson suggested in English.
“Thank you,” Hakkai smiled. “Transformed humans don’t usually fare well. The shift in your senses, the shock of becoming other than yourself… most go insane. Which, I’m sorry to tell you, is what happened to some of the survivors from SG-6 and 10. I was – lucky.” He shook his head. “Gonou wasn’t.”