That he wasn't an adult yet matter very little. Nanami was still at that age where anyone who's age was over ten was old and where even a one year gap seemed like a big deal. Besides, compared to Sakichi she knew next to nothing about how life here worked.

Besides which, there wasn't any time to be thinking about age differences and all that.

"I'll get one too?" Her eyes were wide as saucers as she stared at Sakichi, then back at the pony. Make no mistake, she was grateful for all the fine kimonos and all the lovely things she'd been given so far, but a pony...that was something completely different.

Though when she was told to actually get on the animal...

She stared at her feet for a moment before looking up at her new brother. "I don't know how." And then, a bit more shyly. It didn't occur to her to turn to the servants for help. She wasn't used to having servants, even now, and so far he'd been willing to answer her questions.

"Can you teach me how?" Teach her, but not necessarily help her do it, because she felt like she should learn how to do it for herself.