They love each other really much, even if they discuss so much, even if both made wrong choices and said bad things, even after getting way too many years apart because of stupid fights.
Lilyia, the red fox, is the Bad Bitch™ and always teases her older sister Varvara, the Stupid Bitch™, because of her introvert and quiet personality.
But actually, Lilyia was always the scared one, hiding behind a bitter mask and too afraid to look weak.