@Brian_Z Agnes is young in TS3, rich, and has useful skills for some challenges. To the point where it's been memed on this forum for nearly a decade now.
Ohhh! See, I saw "Aggie K" mentioned in very much the same way Deklitch said. Who? I only started in TS4, never played the previous games. So, I googled her, and the results talked about, apparently, her TS2 incarnation, old and bitter and assaulting young people when they flirt where she can see them. So yeah, rather confusing when people said what a great idea it is to seek her out...
And no wonder she's such an old crank as an elder. All those sims using her for her wealth and useful skills!