They could have heart - to - heart conversations. For example, Shanks could share his past adventures and the lessons he learned from them with Luffy. This would help Luffy gain more wisdom and also deepen their connection.
They could start with a big hug. Then Shanks might tease Luffy about his still - crazy appetite. Luffy, in turn, could show off his new crew members to Shanks.
Luffy might be more confident and less like a little kid around Shanks. He has grown a lot, and Shanks would notice this. Their relationship could become more of an equal partnership in terms of respect.
Shanks influences baby Luffy by being a role model. He shows Luffy the exciting life of a pirate. For example, his tales of adventure on the high seas make Luffy long for the same. Also, Shanks' courage, like when he faces danger without hesitation, makes Luffy admire him and want to be like him.
They might have an epic battle to test Luffy's growth. Shanks could see how much stronger Luffy has become and be proud. Maybe Luffy will show off his new Haki abilities.
You can start by looking on popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'luffy and shanks' in their search bars. These platforms have a wide range of stories, so you're likely to find some good ones.
Shanks might interact with Luffy's crew in a very friendly and father - like way. He could pat the crew members on the back, give them words of encouragement, and share his experiences with them.
In fanfiction, when Shanks meets Luffy's crew, it could be a very emotional reunion. Shanks might be impressed by how much Luffy and his crew have grown. He could see the strong bonds within the crew and be proud of Luffy for leading them so well.
Shanks and Luffy's relationship is one of mentorship and friendship. Shanks inspired Luffy to set out on his pirate adventure and gave him his straw hat as a symbol of their connection.