The former Arsenal boss returns to north London for the first time tomorrow since he was dismissed from the role in December 2019.
Aubameyang has received criticism from pundits and some fans this season, but has had illness and family issues to deal with in the background.
Emery believes the Arsenal captain is still prolific in front of goal as he showed with his strike against Newcastle on Sunday.
“Aubameyang is a killer,” he said.
“He was, he is and he will always be. He has been through a process of being out of the team because of the illness he has had but he is back.
“Aubameyang is there to work, to defend the team and give everything for the team, hoping he can perform at the top level and if that happens he is going to be very difficult to stop.
“We expect to find the best Aubameyang possible, the same with Granit Xhaka, I think he is a great person, a really great footballer.
“He was the top scorer in the Premier League when I was there, he is really good physically and is a killer, like I said.”
Emery was also asked about Swiss midfielder Xhaka, and how he managed to turn around his Arsenal career after last season’s famous incident against Crystal Palace.
“He deserves being in a club like Arsenal and he deserves the respect of the people. I did it back then and I do it now.
Do you want all the latest news from around Arsenal Football Club straight to your email inbox?
Of course you do.
By signing up for our Arsenal newsletter, you will receive a twice-daily email, focused on all the latest news from the Emirates Stadium.
And, not only that, but you will get exclusive content from our club writers Chris Wheatley and Kaya Kaynak before anyone else.
You won’t miss a thing when it comes to the Gunners.
How do you sign up?
It’s easy and only takes seconds.
Simply type your email address into the box at the top of this article – or any article on the Arsenal section of football.london in fact – labelled ‘Get the biggest daily stories by email’ and click ‘Subscribe’.
Alternatively, you can click here and tick the Arsenal box to subscribe for our Gunners newsletter.
If you decide later that you no longer wish to receive the emails, simply follow the unsubscribe link in one of the newsletters – but we don’t think you’ll want to.
“He’s an extraordinary footballer and double extraordinary person.
“I’m really glad he’s enjoying at Arsenal.”