A Weapon's Exorcist

D. Gray-Man and Soul Eater crossover! set in the time period of soul eater.

Allen Walker is a weapon, and a powerful one at that, as well as an Exorcist of the Black Order. "Echo" Hiakari is a strong Meister as well as an Exorcist. There's one problem for both of them. He's a weapon without a Meister, and she's a Meister without a weapon. However, when a certain Meister and weapon pair (cough cough Soul and Maka) try to push them together, both refuse, even though they are the only two without a weapon/Meister. Will Soul and Maka succeed, or will Allen and Echo fail because if their stubborn refusal?