Mike laughed too. "Well yes, that's true, which is one of the reasons I picked you," he said. "And I know you keep her save, I wouldn't ask you if I wasn't certain of that."
He shrugged. "So far she just grows on occasion," he said. "I assume that if she grows she can make herself smaller too but she hasn't, and she doesn't change often - it's not like the twins," he said. Probably that was because she had no one to watch and imitate, but he couldn't say he minded that. "It's most likely to happen when she's very hungry, overly sleepy or generally uncomfortable or displeased, otherwise she seems content to stay the same size most of the time. If she's crying, be prepared for it so that you don't drop her if it happens, but that's pretty much it."