Numbuh 1 a.k.a. Nigel Uno is a bald, British Kids Next Door operative and leader of Sector V. He is described as a tactical genius by some and as a paranoid workaholic by others, he regularly takes his position and responsibilities as a KND operative too seriously. Nigel speaks with a noted English accent, because his parents come from England and he was born there, but moved to the United States when he was 3 years old. He usually wears a red turtle-neck sweater, grey shorts, white socks, and brown shoes, which become rocket shoes when he clicks his heels together. Nigel is seldom seen without his sunglasses and most noticeably of all, he is bald. Numbuh 1 is described as the stern, "workaholic leader of Sector V," as he would rather go on missions than spend his day-off at the beach. He is one of the few operatives in the Kids Next Door that takes his missions seriously, alongside Numbuh 5, he is considered the only one with common sense on his team. Nigel is one of the most skilled operatives in the KND, acting similar to the stereotypical secret agent or spy. As the leader, he is quick to jump into action and is quite resourceful, but tends to be paranoid to the point of stretching the truth and using his imagination when analyzing a potential adult threat. Numbuh 1 can also be reckless, hot-tempered, stubborn, and act alone. Nevertheless, he's caring and protective towards his friends, putting his full trust into them. Although Numbuh 1 is clever, he is also shown to also be rather naive, as he believes that babies were kidnapped and brought to the hospital to be aged into adults, and that babies come from "baby eggs.