Sol Badguy is partially based off of Freddie Mercury, former frontman for the rock band Queen. This includes his name as a nod to Mercury's nickname "Mr. Bad Guy," as well as his leitmotif in the games being called "Keep Yourself Alive," sharing its name with the first song from Queen's debut album. Sol's headband is also inscribed with the words "Rock You," a reference to Queen's song "We Will Rock You."

According to Sol's official bio, his main hobby is listening to Queen, and his favourite album is "Sheer Heart Attack." This may also tie in to his role as Daisuke Ishiwatari's alter ego, as Ishiwatari admits to being a fan of Queen.