In fact, like many others, he only knew her by her English name, Ai Lun, and Little Ai was their nickname for her, neither of which was convenient for a formal introduction. So when his mom asked this question, it stumped him.
After a moment of hesitation, Ai Lun showed a rare moment of quick-wittedness, knowing full well that he didn't know her full name. She pursed her lips, revealing a set of pearly white teeth, and smiled warmly at Iron Hand's mom.
"Auntie, my name is Ai Yiran. I'm the second oldest at home, everyone calls me Little Ai, and you can too."
The brief interlude was fully observed by Iron Hand's mom, who was clearly taken aback.