Benjamin is older than Daniel, but still young compared to the archangels. He spent most of his time on Earth as a guardian angel. The centuries he observed humans left him with great understanding of the bigger picture and the psychology of humans. Being among them and interacting is something completely different and Ben is often misunderstood.
He has a gift that allows him to see different versions of the future. The visions are often so real he can’t discern them from a dream or real life. He doesn’t talk much with others so he won’t say things he shouldn’t say.
He and Daniel met during one of their guardian angels missions. The subjects fell in love and they spent years together watching over them. They became friends out of necessity — being friends with the person you’re stuck with for half a century made it bearable.