Who are qualified for frog breeding? We know that a space player and a time player are a canon pair, but in the fan session I submitted for analysis it was my heir of space and the knight of breath that got frog duty.

Karkat helped Kanaya. People mention, because of that, that the Knight is the one to aid, but I don’t know if Latula ever mentions helping Porrim. Really though, I think it’s just anyone who’s able to and free to help, and generally, Knights are always up to lend a hand.