Sebastian Kazi is born in India to parents who are members of the TheSocietyofSecrets Society of Secrets.

Following old traditions, Sebastian Kazi goes to study with the KnightFamily Knights. He and UlyssesKnightJr Ulysses Jr become life long friends.

Sebastian Kazi returns to his family in India having studied with the KnightFamily Knights in Spain. He and UlyssesKnightJr Ulysses Jr keep in touch and maintain their friendship over the years and distance.

Sebastian Kazi joins the TheAgency Agency, being aware of it since his family is in the TheSocietyofSecrets Society of Secrets. He informs UlyssesKnightJr Ulysses Jr of his new occupation.

DeathBlade Death Blade, attack the KnightFamily Knights, in search of the ArkoftheCovenant key, he kills many of the Knights, chasing them off the Knight estate. The survivors MarcoKnight Marco Knight. UlyssesKnightJr Ulysses Jr. hears about the attack while away from home and goes to obtain help from his lifelong friend Sebastian Kazi who is in the TheAgency Agency. The Agency rounds up Kazi and finds that the Knights are alive, but Kazi refuses to give up Ulysess’s location, thinking that secrecy is the best policy to keep his friend safe.

The TheLeftHand Shapeshifter makes Sebastian's life a living hell and gets him kicked out of the Agency, hoping that he will run

ZackGraves Zack finds Sebastian and corners him in a sake shop in Japan Sebastian is on the run from the TheLost Lost, who now are seeking the ArkoftheCovenant key, having discovered it was not in the village, which they thought it was.

Sebastian explains to ZackGraves Zack that there is a group of metahumans, the TheLost Lost, who in ancient times, had their leader killed by the Knights. They were thought to be dead, but they are apparently back, and are seeking Knight blood. Sebastian agrees to help ZackGraves Zack learn about his power and stay away from the TheLost Lost who are trying to kill the Knights. Sebastian says he has not seen UlyssesKnightJr Ulysses Jr. for years. Sebastian agrees to help ZackGraves Zack try and find his uncle and get some answers.

Sebastian is an ex agent, and friends with Mercedes, after things calm down they speak with Mercedes.
ZackGraves Zack and Sebastian, with Mercedes help on the down low begin tracking down UlyssesKnightJr Ulysses Jr..

Mercedes, now the TheLeftHand Shapeshifter, contacts Sebastian and ZackGraves Zack, posing as Sebastain's old friend and tells them that they have found UlyssesKnightJr Ulysses Jr. and gets Sebastian and ZackGraves Zack to walk into a trap, leading to Sebastian's death.