Is there any good reason to keep Baby Ariel in the game?

I've never seen her in my saves, although I know she's in the game. I thought I'm going to remove her if she starts showing up everywhere, but she's avoiding me and I'm okay with it.
I like premades, but she's useless and I don't like immortal Sims (unless they're vampires, spellcasters or my own Sims that I've decided to make immortals for some reason). As long as she stays hidden in my saves she can stay.