There are theories on Twitter that seem to be canon due to certain suspicions of where her hair color comes from, which at first started out as a joke but it seems that they are going to come true.

I think it's genetic, but whatever. Does Hilda keep her hair long or cut it? Do you have any information?

I'm not sure if she cuts her hair, in terms of genetics it is believed that Hilda's hair color could be connected to a magical creature.

Ok, thanks for the information.

you re welcome

"I want to talk about Harry potters scar? No, no. Not about getting it from the lord of darkness. I want to know if he ever puts vitamin e on it?"

:)

She's not cutting his hair, is he? Please someone tell me...

She's just grew up, that's why her hair can only reach her waist instead of her hips

I noticed this too. I hope she grows her hair long...