Y'know, I was thinking about my headcanon that the Blot likely has a workout routine and somewhat of a beauty routine. I initially saw the former as how he maintained his athletic and acrobatic capabilities needed for heists and the latter as just kind of a vanity thing, but I realized that the beauty routines could also be a bit of a utilitarian habit that he just kept over the years.
You see, I also headcanon that before Blot became a "master thief", he was actually an actor, and this is probably what fueled him to care more about his physical appearance. I mean, if he wanted to keep landing the roles he wanted, he would need to make sure that he was considered attractive enough for auditions. So he came up with a simple routine to maintain his looks and then just never dropped it, justifying it as a tool that makes it easier to manipulate and trick other people as needed.