"Well, typically you guys are born in New York City when born on Earths at all, for one, so the fact that when I went looking for you I landed in Chicago was already a clue. You also don't look like them - they all mostly look like -" She sends a picture of Harley as he is now, grown-up, smiling. "Or -" Nona's face. "One born like that so far but she's not from an Earth, the others get that way by magic on whim. They're initially named after their fathers, who are rich, also physically and verbally abusive, and if left to their own devices long enough they blow up their houses with both parents inside and wander away and, where a Gotham exists, do the unrequited-love-with-costumed-superheroine thing, that's played out in its entirety three times now."