Melody was chased out from her original pack by her litter mates at a young age due to jealousy of her being the next alpha. After a year of hearing nothing from the pack she decided to leave and find a new life for herself.
She taught herself how to hunt and survive on her own and slowly overtime she became bitter towards those who wronged her. After being on her own for so long she made a vow to care for no one but herself.
Melody met Rogue while out hunting for herself. She attacked on sight out of surprise and anger of being caught. Although much older than Rogue, Melody couldn't keep up and had to submit.
She was taken aback by how kind Rogue treated her after she had just tried to kill her. What shook her more though was when the Alpha asked if she wanted to join her pack. Melody flat out refused the offer, to which Rogue responded by rewording herself and gave Melody two options:
"Join the pack or I'll kill you"
Reluctantly Melody agreed.
She was made a hunter and very quickly climbed to the top of the ranks.
She wasn't going to go along with this quietly. She looked out for no one but herself and she made that very clear to the rest of her packmates.