Dreamfyre does not do anything remotely relevant at all even in the book to justify her existence and Helaena never rides her once in the show or shows she even cares about her dragon.
The book says she loved riding her dragon as a kid then as an adult that stops and it can be justified by the tragic stuff she experiences.
The show never shows her riding her dragon as a kid either, so why bother having the dragon at all? They show Helaena as neurodivergent and it would make sense for her to be a Targaryen without a dragon and different also in that aspect.
Dreamfyre is entirely unnecessary even in the book as you could have any other female dragon be the source for Dany’s eggs. That seems the only reason why she might exist at all and it‘s something any other female dragon could have done instead.
Helaena claims her. Dreamfyre is not a dragon hatched in the cradle, so this means she was interested in claiming her, but then she never even has a thought about her dragon?
Show should have had her and Alicent with the child trying to reach Dreamfyre to flee from King’s Landing. Would have made sense as the dragon would have made the escape a lot quicker and no one would have stopped them once they were in the sky.
At least that would have given her dragon something to do and a reason to even be mentioned; otherwise her being a dragon rider has absolutely no purpose.
I really don’t get why GRRM made her a dragon rider at all when this has absolutely zero impact on the story he wrote. He also makes her claim a dragon who has had other riders before and this is also more reason for Helaena to have some relationship with her dragon even as an adult… why bother claiming a dragon she has no attachment to past childhood?
The show, as I said, is even worse in this regard as also as a kid Helaena never once is shown with her dragon. She has no bond at all with her dragon and her having claimed her just seems illogical.
Why would she claim a dragon she ignores completely? The show Helaena is also not impacted by the loss of her child the way the book one is and has even less of an excuse to totally disregard her dragon she wanted to claim, which is always a risky thing. She needed to have cared about this to endanger herself in the attempt to claim Dreamfyre, so for me it makes no sense how she never has a passing thought for her dragon in the show.
Just something I thought of now and that I have not seen people bring up.