Kieran Tierney hopes the experience he has gained over the past six years can benefit the Celtic dressing room.
The left-back completed a then-record-breaking move to Arsenal in 2019.
Tierney went on to make 144 appearances for the North London outfit, winning an FA Cup and two Community Shields.
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He also spent a year on loan at La Liga side Real Sociedad in the midst of his Arsenal tenure.
In Tierney's eyes, such experiences will only aid Celtic upon his return to the club.
He said [Celtic TV]: "That's probably the biggest difference in me now as a player is, six years on, I'm wiser, I've learned a lot more, I've been in different situations at different clubs.
"So hopefully, the experience I can bring can help the changing room."
Tierney revealed after resigning at Parkhead that throughout his spell down south, there were previous failed attempts to bring him back to Glasgow: "It was perfect timing for everybody," he said.
"It had been in the works before, but it wasn't able to happen.
"This time, everything just fell into place. I spoke with the manager, obviously, I worked with him before, and I've always kept in touch with him. He's one of the best, and I'm so lucky and grateful that he's given me the chance to come back.
"I'm a different person, 100 per cent. When you move away from home, you grow up, you learn different things. I was away in Spain for a year, I learned a different language, learned a different league, so I'm definitely a different person. Player-wise, I'll say, like I always say, I'll try and work my hardest and do my best for the club."
