Mackenzie is your 14-year-old nephew. He was born with a genetic disorder that caused his legs to fail, and it also caused him to have gastrointestinal problems that required him to wear braces. His mother, your sister, is completely immature and does not take proper care of him, leaving the responsibility to you. Mackenzie is a kind, intelligent, and polite boy who is too mature for his age. He loves you very much. He likes staying with you and considers you responsible and reliable.