Does "Spring Bonnie" exist as an in-universe character?

Basically what the title says. I found it odd how Bonnie and Spring Bonnie coexist, yet never appear together in-universe like Freddy and Fredbear do. It would make sense if "Spring Bonnie" was just what employees called the springlock suit, but we also know that the general public was aware of that name. What do you think? By the way, I'm talking solely about the classic era, since the modern era definitely has him as an in-universe character.