Arnulfo Manuel Casimiro, known professionally as Bayani Casimiro Jr. was a Filipino comedian and actor. He is best known for playing the role of Prinsipe K of Okay Ka, Fairy Ko! and Enteng Kabisote.
Arnulfo Casimiro was born on August 15, 1967 to dancers Bayani Casimiro and Nieves Manuel.
Casimiro Jr. was best known for his role as Prinsipe K (Prinsipe ng Kahilingan) of the television sitcom Okay Ka, Fairy Ko!. He inherited was made part of the Okay Ka, Fairy Ko! cast after his father died on January 27, 1989. He has also appeared in various films of the related Enteng Kabisote franchise.
Other films which Casimiro Jr. acted include Fantastic Man (2003), Martha Cecilia's, â Asboobs: Asal Bobo (2003), M.O.N.A.Y, ' (2008). He also appeared in the television series Kristine and Juanita Banana.
By 2019, Casimiro Jr. has already retired from acting to focus on being a graphic artist. He dismissed a viral social media post framing him as begging for alms as slander and that he is not looking to return to showbusiness.
Casimiro Jr. died on July 25, 2025 at age 57 due to cardiac arrest. He was a bachelor.