Here's the information I have on them:
-Black Currant Cookie is the more rebellious and energetic of the duo, which is why most consider her the leader. Her weapon is a measuring tape.
-Pastel Meringue Cookie is the perfectionist of the two, hence he's the brains and the more calculating of the two. His weapon is a stick.
-Amongst fans there's rumors that these two are dating, and with collected evidence, these rumors seem to be true, even though we don't really know yet.
For now, that's all we know, since these two just debuted, and at the exact same time.
Maybe they have a connection? Idk