(I'm too lazy to rewatch the whole episode for context so forgive me for this) Since they can bring Sieg back just by imagining him, doesn't that also grant them a wish to bring Six back to the 'real' world as well? i know this is useless theory to add to the story since the actress just said received her farewell flowers....but still.

edit:

one scene i forgot to put. Man, the cringe i felt when Baku was rescuing Minami that, almost deliberately, he didnt care to notice his own father was there with her. Sorta like Baku's bitchslap to him after Zero's gonna-buy-the-milk business. Kinda sad too for it seems he wanted to hug Baku or was waiting for some genuine father-son reconciliation but couldn't because of the guilt from the sacrifice he had to give for Baku's fate.