A Susan
A Susan is a tiny human who thinks they're the center of the universe. They nag, they whine, and they'll turn your life into a nightmare if you let them. Future Karen, current pain.
'I didn't ask for this!', Susan at the grocery store
'This is the worst day ever!', Susan after getting a B on her math test
'You're not my friend anymore!', Susan to her best friend who forgot her birthday