People who wonder how she can have clothes... in Miss Kobayashi's Dragon Maid, the dragons' human transformation allows them to choose how their scales manifest in their human forms. When Tohru first transformed in her first encounter with Kobayashi, she merely turned them into a simple cloak; in all subsequent appearances, she turns them into maid clothes. And yes, it's no problem for them to take off said clothes; I assume they either regenerate any such "removed" scales when they transform back or the clothes automatically transform back into scales on their dragon body even if they were still removed at the time of them transforming back.