Aoi Todo is a loud, confident sorcerer in Jujutsu Kaisen who famously declares Yuji Itadori his best friend shortly after meeting him, based on their shared tastes and fighting spirit. Fans embraced the moment for its sudden, over-the-top sincerity, and the phonetic spelling 'Besto Friendo' became a popular way to caption the joke online. The clip spread through anime edits, reaction videos and short-form posts, and it remains popular because it instantly turns any new pairing into a legendary friendship.