Lukas, or Benjamin in this case, offered his full attention for a spot where he could help, while observing the group with the intention to learn, both team work, and them as individuals. He had time for a soft smile to the girl introducing herself, before looking expectantly at Callie as she said she knew where to find a healer. 
Whether the raven hair was silent due to being shy, or lacking in either confidence or powers, was hard to say, though his burning desire to be of importance was clear as day. He had proven he could take care of himself, at least, though he was hesitant to open up, about his powers, and himself. Stepping up to Callie as she seemed to have a plan, Benjamin made it clear he volunteered to help, or at least hear her out. With this many people, Lukas was not comfortable, nor used to, speaking.