Though she doesn’t have her classic jester cowl on, venom costume adult she does have the white blossom bib and white cuffs that Harley always wore in Batman: The Animated Series where she first premiered. No one can deny that Harley Quinn has a flair for the theatrical. SeaWorld Halloween Spooktacular: Kids can dress in costume for this water-themed Halloween “fantasea” with trick-or-treat zones, whimsical sea creatures and live shows. The costume and wig are back in storage, mikucosplay for now.