Wonder Girl, played Conor Leslie, who has automatically become my favorite thing about the show.
We first meet her in a flashback scene that name-drops several iconic DC characters.
Instead of suiting up as Wonder Girl, she helps the world as a photojournalist.

Credit: John Medland/Warner Bros.
Leslie is perfect as Donna.
Shes confident, smart, funny, charming, and exudes wisdom.
But thats not the case with Donna, who has more of a younger brother-older sister dynamic with Dick.
Im glad the show went in that direction because it makes their relationship within the shows world.
Plus, the Penguin reference doesnt feel forced at all.
Or at least, she tries to.
Of course, Donna is very annoyed at this, but finds a way to salvage the deal.
In other words, shes the one who puts him on the path to becoming Nightwing.
However, thats not the only help she gives him.
It turns out that Kory, a.k.a.
Starfire, was sent here to kill Rachel the Raven.
Actually, Rachel and the rest of the Titans make this discovery in the other side episode, too.