Steven works as a scientist interested in finding out the truth about the Demon. He tries to help the team to find The Demon's Light by providing them with weapons and other gadgets. He also has major expertise in robotics, as evidenced one time when Chris fell into a puddle, requiring Atticus and Melissa to search for help. Using his knowledge of Chris' species, Steven was successfully able to repair Chris with the proper materials.
Melissa Devlin is Steven's older sister, and they look out for each other, even when they were younger. He was the one who found the way to turn Melissa back after she turned into Vanessa.
Steven and Marshall often do not get along, mainly because Steven believes Marshall is working for the Demon.
Steven and Atticus have a good relationship as friends and are shocked to discover they are actually brothers.
Queen of Thieves
Steven has a crush on the Queen of Thieves, but he tries not to show it.
Chris McFarlane and Steven have a great relationship. In Season 3, Chris starts living with Steven. They think of each other as brothers.
Richard Smith was Steven's teacher and co-worker. The two get on very well and Steven is saddened when Richard is killed by the Demon. In season 2, Richard returns as a spirit. With this new form, he is able to act as Steven's adviser and tries to protect him at all costs.
Along with a large amount of knowledge, he also has the ability to read people's minds, which becomes useful later in the series.
- Steven is the only character who believes that Xeren can redeem from his evil ways.