"I love social media. I'm 19, so I'm all on social media, and I've been on social media since I was a kid because I've worked since I was a kid so I'm very conscious of things … Any hate that comes in, it's just … It's a person behind a screen. You just have to move on from it," Carey said.
"But I will say I did delete Twitter [after Comic-Con] because it's just so loud. Even when it's good, there's so many and it's so loud.
"I love the buzz, don't get me wrong, but sometimes it can be overwhelming, and that's me being completely transparent."
At the time of the backlash, Carey wrote in a since deleted tweet: "I stand by what I said in the panel. Alicent is not the villain, folks. When we meet her she's a child, a product of the patriarchy. Just you wait and see. Maybe you'll sympathise."
While she conceded she had to "switch off for a bit" for the sake of her mental health, Carey said there was more than enough support to drown out the hate.
"Post Comic-Con there was a lot of noise, but what's really lovely is a lot of fans noticed that I switched off Twitter and have come to me on other platforms that I use more often and have messaged me making sure I'm okay," she added.
"So I'm definitely feeling the positive vibes from it now, which is really nice.
"I'm very respectful of the fans in the sense of, we're stepping into their world rather than they are watching our world.
"The fans are great. I think, for the most part, we've been welcomed in warmly to this fanbase."
Carey plays the young version of Alicent, who is later portrayed by fellow Brit Olivia Cooke.
House of the Dragon is available to stream on Neon from August 22.
