After setting his cup down, Elijah swallowed, only a couple people knew his reasoning behind hating Dark Guilds and he started to wonder why he hadn't actually told anyone. Sure, it was a fairly sad story for how old Elijah was but he wasn't the only one that had lost a family member at a young age. Besides, he had relatives in Bosco that he had stayed with, and probably could have lived with, but he wanted to become a well-practiced mage and at least find out what the status was on his father. 
Elijah looked at Christina smile, for the amount of time he had actually stayed at the guild he rarely talk about his past, but he always did have the back story of practically being an actor, which most of the guild had heard about. He leaned back in to his seat when Christina mentioned how joining forces helps with getting tasks done and he nodded in agreement. Though the idea of forming a team was one of the few things he thought he would ever do, he certainly agreed with the logic. He as well was someone who preferred working alone, or at least had more experience working alone.
Than Christina brought up a proposition, why not work together? Elijah hesitated but he knew very well that she was a seasoned wizard and thought about it. "You know, that's a fairly good idea. With each others help we'll better ourselves as mage's," He nodded his approval once again, "but let's not make this too formal.... and hey, since you're helping me with something I want, I'll help you with something you want. Deal?" He said as he shook Christina's hand. This would definitely build better chemistry and skills between the two and the result would hopefully be Elijah coming across the whereabouts of his father.