((While Perrie often became the stress for Sybil when they were kids, by the time they reach their teen years, the tables turned.
Sybil, holding out more responsibilities being the next in line for the throne, does her best to follow her mother's footsteps. This includes taking charge of her own sister when needed.
Perrie, grown more of an adventurer than a royal, finds her sister's constant rule of force to be rather grounding in her behalf.
Nevertheless, they still love each other...in their own ways.))
Adventure Time (c) Pen Ward/ Fred Studios