Oh my god they do have the same eyes! Eye shape. I thought it was just their face shape. But jeez. I'm amazed they're not related IRL. Seeing them together like that in your post makes me long for a gifset comparing Liv/Aaron's looks. I can't believe one hasn't been made. Better casting than Buffy and Dawn.
The similarities really are remarkable. I noticed other small similarities when looking at those gifs. They almost have the same chin shape and they have the same laugh lines above their mouths. Everything is almost spot on except their hair coloring. I’m also convinced that Isobel studied Danny’s mannerisms. She does the same lip bite, the downturned mouth like “I have no idea what you’re talking about”, the way she touches her face sometimes, the exasperated eye rolls and she even does the sweaterpaws a lot. Kudos to the casting department.
I would love to see a big gifset like that. Which of my lovely mutuals is taking prompts because this would be amazing to see.