hey, might as well post a few random headcanons of Fawful and Popple i have, because why not?
the two are brothers, Popple's the older brother while Fawful is the younger one.
Fawful is very nearsighted, which is why he needs his glasses, his actual eyes under them are similar to the way i draw Sinder's normal eye, except more like a snake/cat i guess?
Popple knows a bit of how to build things, though he knows little to nothing about cooking. which usually leads to him burning stuff accidentally.
Popple lives somewhere in Teehee Valley, keeping anything he steals in there. Fawful does stay there too in a few AUs where he is alive (eg; bugbro!AU).