Best Answer: Algernon's imaginary friend is Bunbury, whom he pretends visits in the country in order to escape obligations. His real-life best friend is Ernest.lgernon is a charming, idle, decorative bachelor, nephew of Lady Bracknell, cousin of Gwendolen Fairfax, and best friend of Jack Worthing, whom he has known for years as Ernest. Algernon is brilliant, witty, selfish, amoral, and given to making delightful paradoxical and epigrammatic pronouncements.