Divergent allies and enemies
One of Tris's greatest friends, Four Aka Tobias is Tris's boyfriend that has secretly had a crush on Beatrice since the day they saw each other. Four is also a main component at the end of divergent where Tris has to Desimulize him in order for him to stop controlling him. They work together a lot giving tris someone to take her back.
Albert or Al as friends call him is a boy in Divergent who Liked Beatrice Prior but the result of being rejected led him to betraying Beatrice prior and later Suiciding.
He was also depressed about losing in the stages of training. His death later falls on Beatrice because she regrets it.
Eric is the infamous leader of Dauntless faction, he is known for his cruelty in the initiation of the Dauntless candidates, he test the initiates to the edges of death. For example he forces Christina to hang at the ledge of the bridge that crosses the canyon. He doesn't blink an eye as she struggles and shrieks.