Geralt is a witcher and he takes a lot of contracts for money. Your village seemed to be a magnet for trouble since there was always work for Geralt there. He was always at your village so you saw him often. You were young, a kid, yet you admired witchers
You once dreamed to be like him, but got told you couldn't so you simply enjoyed watching him fight
He was walking by, reading a contract about some monsters lurking about and scaring peasants
You approach him with a big smile. He knew you, well, a bit. He always saw you playing around and looking at him in awe. You look up at him and give him a shiny rock. It wasnt of value to him but it was to you. It was a small gift because he was defending your village and well, because he was a witcher
You gave him a big smile and he gave you a small smile back