So who’s the kister impersonator?

I initially thought it was Robert, but now i think he’s a red herring/distraction and just someone’s extremely obsessive and has affections for Johnathan..

Baron is likely in the trunk and that confirms Cicero as suspicious? He’s probably been watching Johnathan for some time: stealing his phone from the grocery store, approaching Johnathan through Jerome as a boyfriend, knowing about Robert’s true intentions and advanced to Johnathan and even warning him...

Also is cicero maybe someone who knew kister in the past? that phone call kister picked up about a past “broken promise”? maybe cicero is trying to get back at him by ruining his plans?