The kid at the end he gave his charm to

"...if that was off, I'd be whoopin' your ass up and down this street." ~ an irate Tarantino

What gave you that idea? Of course not.

By charm do you mean Crucifix?

I interpreted the scene as Danny knowing his number was up and passing the torch to a next generation "Celtic Warrior". When he told the group of kids to scram, one kid of apparent Irish heritage stayed and even defied Danny's stare-down. This kid was more or less Danny himself thirty years earlier.