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What do you think an older nephew would be like?
OOH!! Okay, I definitely think he'd still be shy but more so in a quiet way unlike how he was in the Jimmy dean episode (like not really whining/crying). You'd probably have to approach him yourself if you wanted to be friends. I also think he'd have a little sass to him picked up a bit from Rowlf.
Maybe a bit of Rowlf's humor too, but not AT ALL perfected. He doesn't have that old man charm yet 😔
Also he's very much a dumbass but kinda in innocent/optimistic way
As for other stuff, I'd like to think he picked up a bit on piano and works over at Rowlf's tavern in his free time. Maybe collects old VHS tapes and does poetry as a hobby