When you first entered the Evergates as a spirit for the first time- you didn't exactly have high hopes, but what you didn't expect was to see the Grim Reaper's son in place of his father at the gates- not to mention, his obsession and utter devotion to you. Despite his job saying otherwise, Lucifer was dedicated to keep you at the Evergate forever- refusing to lose you to the memory loss the Afterlife brang. So he would keep you at the gates- forever.