I totally agree with you, since I see that silhouette I thought, "Fruzsina? Wow that would be a awkward first date.
I would have loved the Caroline theorie because as I have said I would love to see more family relatives of Doom (cof, Kristoff,cof) and as far as I remember he never has been shown to interact with Carolina, other hand since he never interacter with her, is hard to determinate if he really sees her as family or just as Morgan daughter since she is already and old woman and he has no hand in her development. Damn I would also love to see Kristoff interacting with an older sister figure, but I think that if Kristoff gets back to Doom life maybe Victorious could fulfill that role maybe, I can dream.
Also found OC how Doom who is always cold and centered suddenly falls in love like a teen with a woman he has only seen a couple of times and never really interacted, he is to old and wise to fall for a picture of a woman who never meet seems to me that the code Fruzsina could be a plan to damage Doom and she could be irreal o a kind of "honey trap" but right now seems like an enemy agent.
I haven't read about the possibility get back Kristoff, and right now I'm happy o hear about it, I wonder if he would be implied to take part in the plot against Doom, would be back at Doom side (then I demand and explanation) or just would be named as a side note.