Tattoo Stan
"Tattoo Stan" was Karl's non-blood related uncle. He was covered in tattoos of various designs, including the names of his six children, all of which he had done himself. Karl thought that this looked "a mess". As he was right-handed and had tattooed his own arms, he had very good tattoos on his left arm, but the ones on his right arm were "rubbish", according to Karl.
During his appearance on the on 2020 Balance Podcast, Karl revealed that Stan had "died ages ago." He mentioned that fans had asked him before about Stan, and would be visibly shocked when told of his death, pondering on whether or not he should have "given people a little catch up."