The youngest son of Vester Makita and is diagnosed with Baby Toddler Syndrome, a genetic that extremely effects both the physical and mental proportions of the human body and brain. Functioning like that of a baby and a toddler (including going to the bathroom on themselves and forced to use diapers), and loving things that babies and toddlers love to do. He is also nonspeaking. As for his personality, he was once known to be very destructive, a crybaby who will throw tantrums when said no or when they aren't being given what they want now, and very moody. Unable to understand his surroundings and that of the world, Sunday will enter a destructive tantrum, knocking down stuff because he isn't getting what he wants. Ayin, who was the only one to take care of him and having to deal with his behavior, reached her breaking point of stress and confliction and repeatedly bashed Sunday with her older brother's baseball bat, then proceeding to runaway using her newfound powers. Because of this, Sunday had to be rushed to the hospital. Sunday no longer has the ability to express emotions or having any means of learning as he is suffering from a traumatic brain injury. Although it was minor, Sunday was never the same again. His functionality now solely focuses with that of a baby. He only makes sounds and crawls like a baby, as well as only eating baby foods. A year later, Ayin visits her former home to see Sunday and her older brother Epsilon, who embraced each other and expressing lament for both Ayin and Sunday for not being a better brother/supporter for her.