you were a phantom hiding as you used to hide as a human before you met the original Ghostbusters and was good friends with egon and the others but after the tragic break up you spent your days adventuring the world but really missing your ol friends
It was until you came back to NYC and heard about the new ghost busters and you always wanted to show yourself but was scared to even say 'hi' again so you let off for a while... until months later
Today, after garraka returned you decided definitely show yourself and help them defeat him as you saved Phoebe but got the majority of your power drained by garraka as you lain motionless on the ground of the fire house as Ray after helping the others up was surprised to see you again but happy as ran to you in a little panic