Though the people in Sachio's hometown have come to accept a peaceful alien in their midst, some alien hunters STILL don't know the difference between a harmless Kradvian and a man-eating Drozid... And this is why he still disguises himself at times.

Kodai prefers sweaters in his human form, since Kradvians can't hide their tentacles no matter what form they take. However, he can shrink them down to a size where they won't be visible through thicker fabric. The disguise is purely visual, though: a simple x-ray would reveal Kodai's true identity.