Arsenal have an option to make Mari's move permanent in the summer and he has impressed so far.
The Spaniard has made two appearances for the Gunners and helped them keep clean sheets on both occasions.
And when asked after Saturday's win over West Ham if he wants to join Arsenal permanently, Mari said: “Yeah, of course.
“I am so happy here. I am going to try and do my best until the end of the season.
“I hope also the club is happy with me and then we are going to find a good end for everybody.
“I want to play in one of the best leagues in the world and I am now here. I am going to do my best for the team, for the club, to win a lot of games and also for the fans to enjoy with me."