They slipped from their mother's womb together, one right after the other. Leandra often said, except for the obvious difference in sex, you couldn't tell the two of them apart. By the time they were three, they still weren't talking such that others could comprehend, but they understood each other just fine. They were two parts of a whole.
By the time they were five, Garrett teased them both mercilessly, but they each defended the other. She was his other half.
By the time they were seven, they were the heroes in every story, and no one could come between them. They were two parts of a whole.
By the time they were nine, they both had other friends, but none as close as each other. He was her other half.
By the time they were eleven, her power had revealed itself. He resolved to learn sword craft and always be her protector. They were two parts of a whole.
By the time they were thirteen, much of their days were spent apart as each developed their own talents, but they somehow found time to share the important tidbits of their lives. She was his other half.
By the time they were fifteen, she had her first crush on a boy, and it was to him she confessed her burgeoning feelings. They were two parts of a whole.
By the time they were seventeen, he was her protection from the templars in the Chantry, always willing to misdirect and put himself between her and them. He was her other half.
By the time they were nineteen, they were at Ostagar, and their entire world changed. They returned to Lothering after the death of the king with the darkspawn not far behind. They joined their mother and brother in fleeing only to have Bethany fall in the time it took for two smashes from an ogre's fist.
How could Carver go on as only one part of a whole?