Brought in as an adolescent, Cobalt immediately began training under Sunray as an Herbalist. Though still quite fresh when she stepped down he quickly and easily put in the hard work to be just as skilled as she was. Over time even becoming more proficient than his tutor. He was still grateful for everything Sunray did for him and began to see her as his mother. Because of this despite his gloomy nature he is quite protective of Mesa and Clay, the only two of Sunray's first and only litter to stay in the pack.