Weeell, so far, Eugene, Lucas, and Glen haven't been revealed, though it's hinted that Eugene and Lucas seem to be around. Eugene seems to be working behind the scenes and doesn't know who Veronica is... Unless Zeze is faking things, I don't think he's Eugene (but then, who would be our choices?)... I guess Glen seems most likely for Zeze. That is, if Zeze is on Minami's side. :3;; But it also seems very obvious...

If Zeze is telling the truth about his memories, I'd say Glen or... Adel! XD;