the only ink kade has is for the fallen, so maybe cal is the one that branded him? if he's good friends with asher and raul then he's definitely known kade since he was a kid. he was usually around anyway, but after his mother killed his father and the cops killed her, he was around more because of asher and raul even though he was withdrawn as hell and preferred to just hide in the corner. he could be like a pseudo uncle, maybe? he's about the age his parents would've been if they were still alive.