The 22-year-old midfielder admitted Emery's vision and detailed plans for his development convinced him to make the switch to Villa Park.
Elliott joins the Midlands club on an initial loan deal that includes an obligation to buy for 35 million pounds, ensuring he will become a permanent member of Villa's squad.
The signing marks a significant investment by the club as they look to strengthen under Emery's guidance.
Having developed at Liverpool and broken into their first team as a teenager, Elliott now seeks to establish himself as a key figure at Villa.
His creativity and versatility in midfield are expected to provide Emery with fresh attacking options as the team pursues domestic and European ambitions.
"It feels incredible," Elliott told Villa TV. "I want to say a big thank you for making this happen. Playing for a massive club like Aston Villa is every kid's dream. I can't wait to get started. To be an Aston Villa player is an incredible feeling.
"For me now, it's about kicking on as a player. The only way to do that is by playing games, and there's no better place to do that than here - especially with this manager, his philosophy, and the way he plays.
"Not only that, but his personal achievements as well. I was really drawn to it. I had a conversation with him, and I was blown away by how he spoke to me, how welcoming he was - that made me want it even more.
"I'm really looking forward to working with him. He's been very welcoming, and what he said to me even before I became a Villa player - it really took my heart. It was a feeling within myself that I wanted to be here and play for him. I think the only way to repay that is to work as hard as I can.
"I'm committed to being here. Like Morgan (Rogers) and other players, many have progressed and become international stars. Morgan is one of them. To see how he plays, the confidence he has in his game, and the personal achievements like winning Young Player of the Season - it shows the pathway is there for players like me to reach that level too.
"Coming to Villa Park, you see how passionate the fans are and how well-drilled the team is. Having the chance to be a part of it - I couldn't say no. I'm absolutely delighted to be here.
"I can't wait. I'm already counting down the days (Villa Park debut). I've played here many times before, and it's not an easy place to come to - that's for sure. Now, I can't wait to be on the other side of it."
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Liverpool defender Ibrahima Konate has joined the France squad for their upcoming World Cup qualification matches, allaying fears over a recent injury.
Liverpool face a tricky challenge in securing Marc Guehi when the January transfer window opens, after their dramatic failure to complete the defender's move on deadline day.
Aston Villa completed a dramatic transfer deadline day by landing Liverpool midfielder Harvey Elliott and Manchester United forward Jadon Sancho on loan, with Elliott's move including an obligation to buy.
