User blog comment:B214/Question and Answers 3/@comment-116.75.185.59-20140807163350/@comment-1359322-20140808235946

It was because those three are the only ones that weren't afraid to be close with Sirzechs. Ajuka a fellow Super Devil and Sirzechs' best friend. Serafall a childhood friend. And Falbium who for some reason isn't scared of Sirzechs (probably due to his laziness).