Tobias Eaton - The son of the Abnegation faction leader, Marcus Eaton who is both very wealthy and very abusive. Wanting to be forgotten, Tobias introduces himself as Four, his deceased Mother's nickname for him. Although Marcus doesn't approve of his nickname, he goes along with it, even if Tobias is rarely let out of his gigantic house, wanting to be seen as a loving father. When more help is needed around the house, because it was very huge, Marcus puts out flyers for servants, and many people from Abnegation are happy to accept.
Beatrice Jackson (a/n I know it's Prior but if you keep reading the description you'll find out) - She lives in Dauntless section and is the daughter of a power hungry, Andrew Jackson and a caring mother Natalie Jackson. She also has a very overprotective brother, Caleb. Things take a turn for the worse when Beatrice and her mother figure out that all these years Andrew had been working with Erudite to create more advanced technology for the city; Jackson Systems. After that's had been completed Andrew divorces Natalie who is unwilling to move from Dauntless and gains custody of Caleb, who he moves with to Erudite. Being the laughingstock of Dauntless and wanting to be forgotten, Natalie changes her last name back to Prior, and Beatrice does the same. 'Beatrice' was the name given by her father, and wanting to be as far away from him as possible narrows it down to Tris, which suits her much better. Because of the divorce and many other factors, Tris and her Mom are forced to move to Abnegation, which is low income housing for those who can't afford it. When something happens to her mother, Beatrice is quick to take a job as a servant for Marcus Eaton.
Kanda Kyoichi transmigrated to Konoha and became a temporary instructor at the Ninja Academy. Fortunately, he awakened the Mentor System.
By teaching others, he could earn rewards.
Thus began Kyoichi's career as a "teacher" in the ninja world.
Shisui: "Sensei's unique interpretation of the Will of Fire has given the Uchiha Clan a true sense of direction!"
Asuma: "The essence of the jade lies in protecting the people, with the advanced leading the way for the less experienced. Only then can Konoha become stronger!"
Kakashi: "He's my life mentor. He transformed Konoha!"
...
Years later, in the memoirs of Kyoichi, now the Hokage, he wrote:
"I honestly just wanted to be a life mentor!"