Zin is her age, and probably would have befriended Philomena sometime during their Hogwarts tenure

Delilah Warbeck is a herbologist nerd and is very serious about her gardening, so I'm sure she'd stop by the greenhouse quite often.

Clifford Hillicker might follow Daffy in one day because they're kind of friends? He grows magical trees for wands/brooms, but he's also a menace and probably shouldn't be there, because he's bound to try to steal something lol.