How old is Allie when she finds out her parents and all their friends are superheroes? Also who's her favorite superhero growing up/ before and after she finds out

I'm of two minds about this, because on one head, I want her running around the Batcave as soon as she can run and on the other hand, I know that Bruce would kill both Tim and Steph if they let her into the Cave or around any of his computers -- she definitely stays at the Clocktower a few times when she's very small, but that probably stops when she gets old enough to remember stuff.

No, realistically, Steph and Tim would probably keep all of this stuff as far away from her as possible so she can grow up without a worry in the world. Damian would probably think this silly when he first comes to Gotham, so there's a few close calls with him, but he'd get behind it eventually. Just takes him a minute.

As far as vigilante and supervillain stuff goes, I don't think Allie would even know what's up with her maternal grandfather, other than him being bad news, until he attempts to make a comeback or something and she's like: Ifeel like I've seen that guy before? Somewhere? and they have to explain it. Maybe he comes back for a bit to take over the Brown's house (like he does in the comics) when Allie's little, but Dinah kicks him and his ilk out and he doesn't cause trouble for them again for a while.

Allie's a smart kid, though, and she's definitely inherited Steph's propensity for getting into stuff she should not be getting into, so it's definitely just a matter of time until she figures things out. I'm thinking maybe early teens, twelve, thirteen, fourteen, and she's outraged, and she's excited and Tim might be semi-retired by the time she finds everything out, but her parents have still been working with the literal Batman since before she was born and literally what is going on. Bruce Wayne is Batman. Bruce Wayne. Nothing makes sense anymore.

Arguments ensue over if she can and should become a superhero herself, but that's for a different place, lol.

I think growing up Batgirl/Orphan/Black Bat/whatever name Cass goes by when Allie's a teen is her favourite hero. And specifically Cass!Batgirl, not that blonde imposter who shows up around the time Uncle Damian arrives in Gotham (which doesn't hurt Steph one bit, not at all, why would you ask).

After discovering everybody she knows is a vigilante, it's suddenly embarassing to pick a favourite, but it probably stays Cass. (Also, Aunt Cass would be half-way through outfitting her in an old Batgirl suit before remembering to ask if her parents are actually cool with this, which also gains her favourite points. She's waited for this day. She can't wait to show her how to punch even harder.)

She'd also find out about Oracle, who she might not know about as your average teenage civillian, and she'd think she's so freaking cool (if a little bit scary). LIke, Babs was cool before, but this is just on a whole other level.