So in ‘Ocean Gem’ when Greg sees Lion, he goes ‘yoouuuuu!?’ all surprisedly. It seems like a one off thing, and Pearl cuts him off before he can expand on it. But then in ‘Maximum Capacity’ there’s a short one off joke about how he has a cat carrier in the storage shed, and Steven asks ‘when did you ever have a cat?’

What if Rose and Greg raised Lion together, and the cat carrier was for Lion when Lion was a baby?