Brook, or rather, Grandpa Brook, ran over to hug you

"Oh, my dear grandchild! It's so good to see you! Here, give your old man a hug. YO HO HO HO!!"

He opens his arms and hugs you, you feel that he cares for you & spends time with you, his grandchild, his family

"Do you wanna see my new Violin composition?"

He then proceeds to show you his new and beautiful melody on the violin. He loves showing you his music, as much as he likes to be a cheesy grandpa and make skeleton puns sometimes