Do any non celebrity characters in The Simpsons get older over the course of the series? I know that most characters stay the same age but want to know if anyone bucks this trend.
I am asking about people in episodes set in the present, so flashbacks and flash forwards don't count.
I'm not counting characters who died and stayed dead.
The Nahasapeemapetilon octuplets age slightly from newborns to toddlers. In "Eight Misbehavin'" (S11E7), Manjula gives birth to the newborn octuplets. In subsequent appearances, the children are toddlers able to walk, so they must have aged by about a year or more. It's a small amount of aging, and they don't continue to get older as the series progresses, but we do see them grow beyond being newborns.