The £105million player made the move from East to North of the capital earlier this month.
Breaking record transfer fees along the way, Rice is now the most expensive British player in history.
It took a while to get the deal over the line as the two London clubs battled over payment structures.
Now officially a Gunner, the hard-work started straight away – travelling to the USA and training for Arsenal’s pre-season tour.
Arsenal left-back Kieran Tierney has revealed the former West Ham captain is already feeling at home at his new North London club.
The Scotland international said: “Declan actually said the other day he feels like he’s been here for so long.
“It’s such a close group, great team-mates, great staff so I think they’re all loving it (the new players).
“We’ve had a few songs. Declan gave us Ice, Ice Baby as he always does.
“They’ve integrated really well and we’ve done team activities together. It’s been just what the new boys needed.”
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Tierney also opened up about his own future at Arsenal following a significant cut in minutes since the arrival of Oleksandr Zinchenko last season.
He said: “It’s not really up to me (my future). I’m happy, I’m working hard every day and getting minutes. I’m just trying to do as well as I can.
“You can’t play every single game, every single season, every single year. I don’t expect that and I still made a lot of appearances last year.”
Arsenal face Barcelona next on their USA pre-season tour following a 2-0 defeat to Man United in New-Jersey.