The Gunners completed a 75-million-pound deal for the 28-year-old from Newcastle United on Saturday, with Guimaraes presented to supporters at the Emirates Stadium before Sunday's meeting with Borussia Dortmund.
The midfielder was not included in Arsenal's matchday squad for the fixture, which ended in a 3-2 defeat for the hosts. He is, however, expected to have an opportunity to make his debut against Como on Wednesday.
Arteta was particularly keen to bring Guimaraes to north London and has explained what he believes the midfielder will contribute throughout the campaign. His arrival also gives Arsenal greater depth in midfield and provides the manager with additional tactical options.
"I think he describes himself as a warrior," he said. "I think he's a warrior with a tremendous quality as well and intuition and leadership and charisma that is going to help us, that is going to really ignite something different in the team.
"I'm delighted to have him. We see very clearly - especially the energy that he brought immediately to the training ground - the hunger, the desire to come here and create a big history at the club. That's the ambition that we need.
"We want to go to the next level and are very, very much convinced that we're going to need players with such a personality, desire and character to push everybody inside the organisation to go even higher."
He added: "On the pitch, versatility to play in two different positions in relation to what we want or the opponent does.
"A player which obviously has tremendous timing and intuition to win the ball back and progress play very, very fast.
"He's a player that is very comfortable putting people through, moving between the lines, moving in behind.
"And then he's a goal threat. He's got a smell and a really good timing to get in the box. And he has the capacity to finish the actions."
Guimaraes joins a group that includes Declan Rice, Martin Odegaard, Martin Zubimendi, Myles Lewis-Skelly, Ethan Nwaneri, Eberechi Eze and Mikel Merino.
