Loki Disney Plus - Trailer

I have a theory but am not too sold on it. There's someone else involved in the attacks against the TVA. The little girl with the blue gum pointed at the stained glass image of a devil. Sylvie doesn't act like a devil and we learn that she's actually a good person. And then the reason that started my speculation, the devil in that glass window has a blue tongue. So then the issue would be that if it wasn't Sylvie that time it had to be Mephisto because the girl was most likely being literal, that he looked like the devil. I'm not sold on him being involved so I think this random thought was all for nothing.
The show runners have outright said Mephisto won’t be appearing. So unless they’re straight up lying (which isn’t impossible I guess), I wouldn’t wait up. More likely the girl took a hooded Sylvie with the horns on her tiara as the devil.

I really don’t know how we get through the finale without at least a direct reference to Kang. The way the shows have gone so far, it’ll probably be another Loki behind it, but nobody else in the canon comes to mind that could fit except Kang. And that they cast him nearly a year ago, Renslayer, the TVA…the dots connect to him. And we may not even see him. But I think it ties to him before the end of the next episode.