Something old.
They'd loved each other since they were children. They'd made a family, or what passed for one in that broken old Tower. He'd always loved watching her comfort Sho and Millianna when they needed it. Wishing that he could do the same. Then, seven years. Alone. Then seven more. She was back, and their old love stayed.
Something new.
The stiff formal wear. It wasn't like he'd ever needed a tuxedo, not for years. Maybe he'd had one as Siegrain, but he hadn't exactly had time to pack before the Magic Council discovered that he'd been playing them all along. It wasn't very comfortable. Although, he could only imagine how Meredy felt. Ultear had forced her into a poofy pink dress, and the girl had been sending him glares from across the room for ages. Even though it was her fault that he was standing in front of Makarov, shifting from foot to foot.
Something borrowed.
The day. He was still reviled by so many, himself most of all. He had to atone, and he knew that. Which was why stealing a day to be happy was wrong. He'd just have to return another one. But a borrowed day to be happy was better than none at all.
Something blue.
The colour of his hair and her guild mark. And the colour of the decorations that covered the guild hall. (Really, he would have preferred scarlet.)