Long-serving manager Arsene Wenger bid the club farewell at the end of the season after 22 years in charge.
Emery continued on the club's official website: "I have met (majority owner) Stan and Josh Kroenke and it's clear they have great ambitions for the club and are committed to bringing future success. Arsenal is known and loved throughout the world for its style of play, its commitment to young players, the fantastic stadium, the way the club is run", he said. "It's very important for me to be protagonist with the ball and pressing when you don't have the ball".
Emery's reputation was elevated after guiding Sevilla to three straight Europa League titles, but he couldn't make an impact in the continent's more illustrious competition.
Arsenal won three FA Cups in Wenger's final five seasons at the helm but they have tended to view the Premier League title race from a distance over recent years - something Emery is keen to change. However, under Emery, PSG witnessed a humiliating defeat to Barcelona in the last 16 a year ago, losing 6-1 at the Camp Nou after a 4-0 win in the first leg.
"He's one of the biggest talents here at Arsenal and I want talented players here", said the ex-Sevilla boss, who is fresh from landing a domestic treble with Paris Saint-Germain.
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Unai Emery may have come up on the rails to land the Arsenal job - but springing surprises is certainly not one of the Spaniard's traits.
Three other assistants - technical coach Pablo Villanueva, fitness coach Julen Masach and video analyst Victor Manas - also have worked alongside Emery for several years. We had a meeting on Monday. "All were interested in the position and we were unanimous in our choice of Unai to drive the next chapter of our history", he added. The rest of his career was largely spent in Spain's lower leagues with sides Toledo, Racing Ferrol, Leganes and Lorca Deportivo.
Emery also addressed his immediate priorities upon joining the Gunners.
No managerial appointment or new signing is complete without a glossy welcome video, and Arsenal did not disappoint with a slick production beckoning the Unai Emery-era. The Argentine didn't have a single press conference in English for his first 18 months in the Premier League and that allowed him to absorb the culture and feel his way into the PL. Emery is already way ahead of Pochettino in that respect and even if Arsenal's fans are looking for instant answers in every single press conference, it's unlikely Emery will deliver them simply because he has yet to master the English language.
Arsenal conceded 51 league goals this past season and lost seven consecutive away games in 2018 before finally winning at Huddersfield Town on the last day of the season.