Siblings on the move to a circus

There was two siblings who wandered city after city. The two siblings were named Echo and Cybil. Echo was a wolf rabbit hybrid and he loves t o hang out with his older sister. Cybil is a small little caat who is mute and has the ink illness. As they were wandering one day, they saw Mickey's circus going to be performed sometime today. So they decided to head down to check it out. When the show was over, they headed back to see the crew. What happens when Mickey and the others find out that Cybil has the ink illness, and what happens when after Cybil gets recovered her and someone bond and it makes her want to join them?
(DISClAIMER! I do not own The Quest To Build The Ink Machine, but I do own Cybil, Echo and the story's plot!)