Oh god. Oh god. Maru, you can't just tell people that! Madoka's polite self is just crumbling at witnessing this conversation!

"A.. Ah, y-yes, mister Piccolo is green, but it looks really nice on him!" Judging by how much more rapidly she's speaking than usually, Madoka is definitely getting worked up. She has to fix this somehow. "S-Sorry, mister Piccolo, but they don't have green-skinned people where either of us come from, so I-I'm sure it's just a surprise to Maru!"