Onana is known to take risks with the ball at his feet, which has led to some high-profile howlers in the past.
But he told the Telegraph: "That's how I am. I often take a risk. And I think you're going to see that this season because I'm going to take a lot of risks.
"I can already tell in advance. Be prepared because it will stay that way this season, trust me!
"The best teams in the world take chances. I will take responsibility and I think my back is big enough to bear the responsibility. I think it will be a great season."