Choke Leash is the older sister (18)
Chain Leash is the younger brother (10)

in a fight they work together as Choke being the better of 2 at fighting would use Chain as a flail, grappling hook, etc but while not fighting their roles are somewhat reversed, choke is forgetful, lazy, stubborn and childish at times, while chain is smart, serious and hardworking but at times likes to be stroked/fussed like a puppy because he is still one