Bailey is the bratty biker, who loves to mess with other kids, including Tails, Cream and Charmy. The two make a great relationship that they share, so Bailey sleeps on Vivian's big belly and Vivian loves Bailey and doesn't abuse her, unlike Eggman, who abuses Orbot and Cubot, and Starline, who abused Surge and Kit. It's clear that Bailey is the adopted daughter of Vivian, herself. Bailey, her newly adopted daughter, share a mother and daughter friendship. Vivian is proud of her for all the things, she's done. That's what makes her special to this big queenpin. This proves that Vivian is a gentle giant to Bailey, no matter how large and heavy, she is.