Alexis Sánchez seems pretty pleased to have joined Arsenal, and looks forward to linking up with Mesut Özil, among others. In an interview with the official club website, Alexis said
With Ozil in the squad Arsenal was (close) to winning the league title (last season). I hope I can make a contribution so we can win as many titles as possible. We have a great squad and we are a big club. We can achieve big things.
Arsène Wenger is said to have played a big role in convincing Alexis to join, with the Chilean talking a little bit about the manager's role:
I was told that he is a manager you can learn a lot with. He wants to achieve great things in football and that helped me make the decision to sign for Arsenal. Arsene Wenger's style of play is the sort of style the Chilean national team has, so therefore I am used to it. Arsenal plays very well, which fits my style. That is why I moved here.
The official website called Alexis a striker, and he did confirm that he and Wenger had discussed his possible role at the club, with that becoming clearer once Alexis joins up with the team in training towards the end of the month.