Stage names are a tricky thing when you’re trying to get or stay popular, especially when you have a long and varied career. Depending on their company, many idols start building a fan base as trainees, using their given names, as they haven’t yet gotten a group or carved out their niche or crafted their persona. Once a group has been formed and a debut date has been selected, the marketing team works diligently to promote the idols in their new image, sometimes completely changing how we’ve known them through survival shows or as collabs or guests. The new and much wider fan base develops a relationship with the idols and their reputations and personas solidify. Sometimes there is some reshuffling and renaming, think Ikon, but for the most part, they stick to what they were given at the start. Consistency is key when keeping your fans.