She joined the pack after Samantha (her pair bond), but despite Samantha's aggressive personality clashing with Rosie's friendly one, the two wolves slowly but surely fell in love with each other.
At first, they loathed each other; Samantha would make sarcastic insults mocking other wolves, as in her nature. Rosy would often times come to the other wolf's aid and fend her off from the other wolf.
Then they began to enjoy their time together.
It had ben a while since Samantha had found a rival this passionate, and yet somehow so dedicated to finding loopholes in her words. Rosy, meanwhile, found it uplifting to
It started when Rosy asked Samantha to go on walks in the woods with her. Samantha only accepted at the time, because she wanted to know why she defended the rest of the pack from her jests so fierily.
The response she got softened her lonely heart.
After a while, the two enemies relationship grew, and in time, many of the pack would often see the two lounging around in the grass together, both with wide grins on their faces.