Syonide was born in 1990. When she was an infant, she was found in a dumpster, with her umbilical cord wrapped around her neck. When she was 8, she was pulled out of an orphanage by Tobias Whale, she was clothed and fed by him, and trained to become an assassin. When she was fully grown, Tobias had carbon fiber body armor implanted in her skin.
During the series
After Lala attempted to escape Freeland, Syonide and Joey Toledo stopped him in his tracks, pointing guns at him and taking him to Tobias Whale. They watched on as Tobias punished Lala for his incompetence. Some days later, Tobias punished him again as Syonide watched, putting a gag on his face. Three days later, Syonide accompanied Tobias into the Freeland Police Department, watching him kill Lala before he could rat him out.
Following the death of Lawanda White, a number of Freeland citizens organized a march on The 100. While Tobias organized a hitman to kill the leader, Reverend Jeremiah Holt, he was stopped by Black Lightning, forcing Syonide, as backup, to shoot him from a distance, also hitting Khalil Payne. Sometime later, Syonide visited Peter Gambi with Tobias, where he attempted to learn the identity of Black Lightning, to no avail. Days later, Syonide watched bemusingly as Tobias choked Joey Toledo for having failed to take out Black Lightning. She received a message, assuring that Tori's protection team had checked in. A few days later, Syonide accompanied Tobias and Toledo to the former's doctor's appointment. Later that night, Syonide also rode with Tobias and Khalil, assuring Khalil that he would walk again despite being paralyzed.
Tobias had Syonide set up a meeting with Lady Eve and her people. Syonide later accompanied Tobias and his crew to a club opening, where they encountered a vengeful Black Lightning. She attempted to help Tori escape, before drawing a gun on the vigilante. She soon escaped, albeit without Tori, who was killed in the crossfire.
Tobias sent Syonide to bring Kara Fowdy to him so he could question her about Proctor's briefcase. Kara refused to go with her as she was trying to leave town, resulting in a fight. After a gun battle that left their weapons empty, Syonide and Kara faced off with hand weapons – twin batons for Syonide, and high-heels with blades in for Kara. Syonide knocked Kara down, but Kara threw one of her shoes at Syonide. The blade struck her in the neck, causing a fatal wound.
- Peak of human physical condition: As a trained assasin, Syonide was in top physical condition.
- Master combatant/Martial artist: Syonide has shown to be highly proficient in close quarters combat, shown when she fought Anissa Pierce. While the latter used her powers, she managed to make use of Anissa's moments in between using her powers and bring her down temporarily.
- Master stick fighter: Syonide was a highly a highly skilled stick fighter, able to trade blows with Kara Fowdy and even briefly overwhelm her.
- Master markswomen/Firearms: Syonide is highly skilled with the use of firearms.
- ↑ "The Book of Blood: Chapter Two: The Perdi"
- ↑ "Shadow of Death: The Book of War"
- ↑ "The Resurrection"
- ↑ "Lawanda: The Book of Hope"
- ↑ "Lawanda: The Book of Burial"
- ↑ "And Then the Devil Brought the Plague: The Book of Green Light"
- ↑ "Three Sevens: The Book of Thunder"
- ↑ "Equinox: The Book of Fate"
- ↑ "The Book of Consequences: Chapter One: Rise of the Green Light Babies"